There are many religions in the world. They do not all teach the same thing. In fact, many of them contradict each other. So, they can't all be true and it cannot be said that each is a different path to God. What are we to say about all those other religions compared to Christianity? To get to the point, all other religions besides Christianity are false.
If Jesus is who He said He was, God in flesh, then whatever He says is authoritative and true. He said that He was the way the truth and the life and that nobody comes to the Father except through Him (John 14:6). Right there we see that any other way, according to Jesus, is not true.
Christianity bases its truth and its doctrine on the word of God, the Bible. In the Word of God, Jesus claims to be the only way. Since He performed many miracles, raised people from the dead, commanded a storm to be still and it obeyed, healed diseases, and rose from the dead, then we are forced to face the reality of His words. Is what He said true or not? Either Jesus is a liar, a lunatic, or He is Lord. No one else in history, except Jesus, has fulfilled detailed prophecies, performed many miracles before eyewitnesses, and risen from the dead. Jesus is unique.
Those of us who are Christians, have trusted what Christ has said. We believe in what He said and did. Like it or not, Jesus is the one who said He was the only way. It is not the Christians who are being "narrow-minded." It is Jesus. Therefore, to say that other religions can be true means that Jesus is false. To say that there are other ways to God, also means that Jesus is false. This is what it comes down to. Either Jesus is who He said He was and what He said is true, or He is false. This is the choice you must make: To trust what He said, or reject His words.