Why do FtMs get so fucking mad and insinuate you're this or that when you tell them that you see them as men, but you like biocock capable of shooting sperm and the lack of that is a dealbreaker?

I'm on E and if a straight guy told me "uhhh sorry I really want a vagina" I'd be like "ok" and move on. There's no shortage of them and you can't change your sexuality. Some people care about genitals and I feel like that's reasonable since that's what most people use to have sex?