Answer by Kris Rosvold:
Nope, I don't find it offensive to assert that I'm going to a mythical place when I die, for hurting the feelers of some poor little omnipresent, pedantic, psychopathic, capricious "god".
What I absolutely do find deeply offensive is the implied (and sometimes outright) assertion behind that statement, which says:
"You must live Our way because you aren't competent to determine your own morals."
I've got a Major Problem with that bit of flagrant bull crap and, by extension, anyone who makes such an assertion.