But why does that offend you?
I'm not offended by the Muslim who believes exactly the same of me, at least as long as he isn't trying to cut my head off. I'm not offended by the atheist who tells me my belief system is no different from belief in a Great Flying Spaghetti Monster. Amused, and sometimes perhaps slightly annoyed, but not offended.
Why are you offended by the belief system of someone who you believe is wrong, and whose belief has absolutely no effect on you or your life?
I'm not trying to be facetious, I'm really curious why so many Jews seem to be offended by this stuff.
You honestly don’t understand why this offends us?
Christianity claims to be the ONLY way to G-d and that everyone else is damned to an eternal hell.
Since when is Christianity the only “true” religion?