Some people don't like the idea of Christianity because of it's exclusive nature. In other words when Christ says "I am the way the truth and the life no one comes to the father except through me" (John 14:6) he's making an absolute statement that excludes all other ways to God. For anyone who is a fan of pantheism (the idea that there are multiple gods) or anyone who believes that everyone finds their own way to God, this statement becomes a problem. Believe it or not Christianity is not the only world view that fosters an exclusive idea. Buddha, for example, left the Hindu religion because he didn't believe in all of their tenets. So he made his own religion claiming different pillars of faith making his world view exclusive of Hinduism. The fact is every major world religion has some form of exclusivity in it (this includes Atheism) and the reason is simple...they all claim to be true.
Truth itself is exclusive. Let's say for example that you asked me what color my race car is. I would say well it's actually four colors: purple, green, black and white. You could then go look at my car and see if this is true. (By the pictures on our website you know that it is.) By default this excludes all of the other colors in the pallette. This doesn't mean that we hate red or blue or have something against yellow. It simply means that the colors I gave you are the true answer to your question; and the truth excludes anything that is not, in fact, true. Jesus' goal when he spoke the words he did in John 14 was not to invite hate or separation it was simply to give you information that you could count on was correct.
The fact is it doesn't matter what you believe somewhere along the line it's exclusive if it is true. Since that is the case should we not put every effort into making sure we find out what exactly the truth is?