Heh. Brutus, you are talking about a different kind of exclusivity. But you have touched on a very important point. Although Christianity claims salvation is found in Christ alone while others say all paths lead to God, Christianity is one of the few religions (or the only one) where salvation is possible for all who simply believe.
Many other religions, such as Buddhism or Hinduism, claim that all paths lead to "God," yet only those (the spiritual masters) who attain enlightenment or know and master some other secret higher knowledge can progress spiritually to a point of "salvation."
So the interesting thing is that while Christianity is exclusive, salvation is available to all, whereas with inclusive religions, salvation can be attained by only a few (not only that, they reject the exclusive religions, so they are, in fact, exclusive themselves). :-?