For me, it’s this subset of vegans:

Me: want a burger? V: No thanks, I’m vegan. Me: Oh, cool. Well there’s egg and cheese in the salad dressing so you’ll want to avoid that too, but I have some black bean patties in the freezer if you want. V: Do you know how bad meat is for your body? Me: Yeah I actually do, but we all make our own decisions about self-harm, don’t we? V: Factory farms are cruel and sadistic! Me: Agreed. That’s why I buy from a local butcher. V: RAISING MEAT IS DESTROYING THE PLANET! Me: Corporations are destroying the planet. Now fuck off and let me enjoy my burger in peace.