Christians have always been accused of either being arrogant or ignorant to claim that that is only one way to God. However the issue underlying the question here is the one of "Truth".
Apologist Nathan Betts points out that truth, by its very nature, excludes. It is exclusive.
For many people in the west, that is a very uncomfortable concept. We don't want to believe that there is only one truth. We want to celebrate tolerance and diversity. Therefore, one will be deemed as intolerant and narrow-minded to claim that there is an exclusive "truth".
Yet, at the end of the day, we have to ask ourselves the question: What really is true?
Jesus said to him, "I am the way, the truth, and the life. No one comes to the Father except through Me. - John 14:6