Haha, even as an occasional meat eater I liked this comment. If this sort of comment is annoying, maybe time to inquire into the defensiveness. Maybe you have too much "skin" in the game?
The annoyance is fascinating to me, because I grew up eating meat and also felt such annoyance. It's an interesting thread to pull if you're into knowing thyself - why do I feel especially aggravated on this topic? Might lead you somewhere.