In Islam, there is only one God who, like Christianity, is absolute, immutable, holy, righteous, and forgiving.  Most probably Muhammad got his basic ideas about God from the Christians and Jews. However, in Islam, God is not love, as he is in Christianity (1 John 4:8) and he only loves Muslims (Surah 3:31-32).  Islam denies the Trinity and mistakenly equates Mary as part of what it sees as the trinitarian heresy.  Of course, that is a misrepresentation of the Trinity.  So, Islam does not present the true God of the Bible. In fact, the Quran and the Hadith contradict the Bible. Allah, the God of Islam, is not the God of the Bible.

1. Allah does not beget a Son
   1. Surah 23:91, “No son did Allah beget, nor is there any god along with Him: (if there were many gods), behold, each god would have taken away what he had created, and some would have lorded it over others! Glory to Allah! (He is free) from the (sort of) things they attribute to Him!”
   2. Surah 19:88-93, “They say: “(Allah) Most Gracious has begotten a son!” 89 Indeed ye have put forth a thing most monstrous! 90 At it the skies are ready to burst, the earth to split asunder, and the mountains to fall down in utter ruin, 91 That they should invoke a son for (Allah) Most Gracious. 92 For it is not consonant with the majesty of (Allah) Most Gracious that He should beget a son. 93 Not one of the beings in the heavens and the earth but must come to (Allah) Most Gracious as a servant.”
2. He does not love unbelievers
   1. Surah 3:32, “Say: “Obey Allah and His Apostle”: But if they turn back, Allah loveth not those who reject Faith.”
   2. Surah 30:45, “That He may reward those who believe and work righteous deeds, out of his Bounty. For He loves not those who reject Faith.”
3. He causes people to stray
   1. Surah 2:26, “Allah disdains not to use the similitude of things, lowest as well as highest. Those who believe know that it is truth from their Lord; but those who reject Faith say: “What means Allah by this similitude?” By it He causes many to stray, and many He leads into the right path; but He causes not to stray, except those who forsake (the path)”
   2. Surah 7:155, “And Moses chose seventy of his people for Our place of meeting: when they were seized with violent quaking, he prayed: “O my Lord! If it had been Thy will Thou couldst have destroyed, long before, both them and me: wouldst Thou destroy us for the deeds of the foolish ones among us? This is no more than Thy trial: by it Thou causest whom Thou wilt to stray, and Thou leadest whom Thou wilt into the right path. Thou art our Protector: so forgive us and give us Thy mercy; for Thou art the best of those who forgive.”
4. He is creator
   1. Surah 2:29, “It is He Who hath created for you all things that are on earth; Moreover His design comprehended the heavens, for He gave order and perfection to the seven firmaments; and of all things He hath perfect knowledge.”
   2. Surah 3:191, “Men who celebrate the praises of Allah, standing, sitting, and lying down on their sides, and contemplate the (wonders of) creation in the heavens and the earth, (With the thought): “Our Lord! Not for naught Hast Thou created (all) this! Glory to Thee! Give us salvation from the penalty of the Fire.”
   3. Surah 36:81, “Is not He Who created the heavens and the earth able to create the like thereof?” – Yea, indeed! For He is the Creator Supreme, of skill and knowledge (infinite)!”
5. He is eternal
   1. Surah 112:2, God, the Eternal, Absolute.
6. He is First and Last
   1. Surah 57:3, “He is the First and the Last, the Evident and the Immanent: and He has full knowledge of all things.”
7. He is judge
   1. Surah 3:30, “On the Day when every soul will be confronted with all the good it has done, and all the evil it has done, it will wish there were a great distance between it and its evil. But Allah cautions you (To remember) Himself. And Allah is full of kindness to those that serve Him.”
   2. Surah 95:8, “Is not Allah the wisest of judges?”
   3. Surah 99:6-8, “On that Day will men proceed in companies sorted out, to be shown the deeds that they (had done). 7 Then shall anyone who has done an atom’s weight of good, see it! 8 And anyone who has done an atom’s weight of evil, shall see it.”
8. He is the light of the heavens and earth
   1. Surah 24:35, “Allah is the Light of the heavens and the earth. The Parable of His Light is as if there were a Niche and within it a Lamp: the Lamp enclosed in Glass: the glass as it were a brilliant star: Lit from a blessed Tree, an Olive, neither of the east nor of the west, whose oil is well-nigh luminous, though fire scarce touched it: Light upon Light! Allah doth guide whom He will to His Light: Allah doth set forth Parables for men: and Allah doth know all things.”
9. The is no God but Allah
   1. Surah 2:255, “Allah! There is no god but He – the Living, the Self-subsisting, Eternal. No slumber can seize Him nor sleep. His are all things in the heavens and on earth. Who is there can intercede in His presence except as He permitteth? He knoweth what (appeareth to His creatures as) before or after or behind them. Nor shall they compass aught of His knowledge except as He willeth. His Throne doth extend over the heavens and the earth, and He feeleth no fatigue in guarding and preserving them for He is the Most High, the Supreme (in glory).
   2. Surah 3:18, “There is no god but He: That is the witness of Allah, His angels, and those endued with knowledge, standing firm on justice. There is no god but He, the Exalted in Power, the Wise.”
   3. Surah 112:1-4, “Say: He is Allah, the One and Only; 2 Allah, the Eternal, Absolute; 3 He begetteth not, nor is He begotten; 4 And there is none like unto Him.”
10. Obey Allah and Muhammad
    1. Surah 3:32, “Say: “Obey Allah and His Apostle”: But if they turn back, Allah loveth not those who reject Faith.”
11. He is omnipotent
    1. Surah 6:61-62, “He is the irresistible, (watching) from above over His worshippers, and He sets guardians over you. At length, when death approaches one of you, Our angels take his soul, and they never fail in their duty. 62 Then are men returned unto Allah, their protector, the (only) reality: Is not His the command? And He is the swiftest in taking account.
12. He is omnipresent
    1. Surah 2:115, To Allah belong the east and the West: Whithersoever ye turn, there is the presence of Allah. For Allah is all-Pervading, all-Knowing.
    2. Surah 7:7, “And verily, We shall recount their whole story with knowledge, for We were never absent (at any time or place).“
13. He is omniscient
    1. Surah 2:115, “To Allah belong the east and the West: Whithersoever ye turn, there is the presence of Allah. For Allah is all-Pervading, all-Knowing.”
    2. Surah 2:268, “The Evil one threatens you with poverty and bids you to conduct unseemly. Allah promiseth you His forgiveness and bounties. And Allah careth for all and He knoweth all things.”
    3. Surah 10:61, “In whatever business thou mayest be, and whatever portion thou mayest be reciting from the Qur’an—and whatever deed ye (mankind) may be doing—We are witnesses thereof when ye are deeply engrossed therein. Nor is hidden from thy Lord (so much as) the weight of an atom on the earth or in heaven. And not the least and not the greatest of these things but are recorded in a clear record.”
14. He is one
    1. Surah 4:171, “O People of the Book! Commit no excesses in your religion: Nor say of Allah aught but the truth. Christ Jesus the son of Mary was (no more than) a messenger of Allah, and His Word, which He bestowed on Mary, and a spirit proceeding from Him: so believe in Allah and His messengers. Say not “Trinity”: desist: it will be better for you: for Allah is one Allah: Glory be to Him: (far exalted is He) above having a son. To Him belong all things in the heavens and on earth. And enough is Allah as a Disposer of affairs.”
    2. “Narrated Abu Said Al-Khudri: A man heard another man reciting (in the prayers): ‘Say (O Muhammad): “He is Allah, the One.” (112.1) And he recited it repeatedly. When it was morning, he went to the Prophet and informed him about that as if he considered that the recitation of that Sura by itself was not enough. Allah’s Apostle said, “By Him in Whose Hand my life is, it is equal to one-third of the Quran.” (Bukhari: Book 9: Volume 93: Hadith 471 Narrated by Abu Said Al-Khudri)
15. Trinity is not true
    1. Surah 4:171, “O People of the Book! Commit no excesses in your religion: Nor say of Allah aught but the truth. Christ Jesus the son of Mary was (no more than) a messenger of Allah, and His Word, which He bestowed on Mary, and a spirit proceeding from Him: so believe in Allah and His messengers. Say not “Trinity”: desist: it will be better for you: for Allah is one Allah: Glory be to Him: (far exalted is He) above having a son. To Him belong all things in the heavens and on earth. And enough is Allah as a Disposer of affairs.”
16. Trinity and Mary
    1. Surah 5:116, “And behold! Allah will say: “O Jesus the son of Mary! Didst thou say unto men, worship me and my mother as gods in derogation of Allah?” He will say: “Glory to Thee! Never could I say what I had no right (to say). Had I said such a thing, thou wouldst indeed have known it. Thou knowest what is in my heart, Thou I know not what is in Thine. For Thou knowest in full all that is hidden.
17. Unique
    1. Surah 112:4, And there is none like unto Him.
18. Worship Allah only
    1. Surah 3:64, “Say: “O People of the Book! Come to common terms as between us and you: That we worship none but Allah; that we associate no partners with him; that we erect not, from among ourselves, Lords and patrons other than Allah.” If then they turn back, say ye: “Bear witness that we (at least) are Muslims (bowing to Allah’s Will).”
    2. “Narrated Ibn ‘Abbas: The Prophet used to say, “I seek refuge (with YOU) by Your ‘Izzat, None has the right to be worshipped but You Who does not die while the Jinns and the human beings die.” (Bukhari: Book 9: Volume 93: Hadith 480 Narrated by Abu Said Al-Khudri)
19. Worship of Allah
    1. “The Prophet said, “O Mu’adh! Do you know what Allah’s Right upon His slaves is?” I said, “Allah and His Apostle know best.” The Prophet said, “To worship Him (Allah) Alone and to join none in worship with Him (Allah). Do you know what their right upon Him is?” I replied, “Allah and His Apostle know best.” The Prophet said, “Not to punish them (if they do so).” (Bukhari: Book 9: Volume 93: Hadith 470 Narrated Mu’adh bin Jabal)