I, for one, have long been rather annoyed at the incomprehensible alliance of "people of faith" versus the rest of us. "People of faith" believe in very different things, and this includes rather vast differences within the major faiths as well as between them.
So, yes, lots of religious people believe that they've found the one true path to eternal salvation and everyone who doesn't share that view is going to hell forever. This might seem like a rather abhorrent and morally vacuous view of the universe, but it isn't a fringe view. Lots of people believe it. According to this poll, 24% of Americans who believe in the existence of Heaven think that only Christians can get to Heaven.