I'm a north American who is currently around a number of vegans and they've all been quite respectful around non-vegans. These jokes/memes confuse me and one of the ways it makes sense to me is that's it's a projection. A mental twist to give themselves a moral high ground or less guilt to justify all their own talking about preparing and eating meat.

I'm more likely to hear a meat eater complain about how difficult it is to not eat meat. Some that I have been around act like it's the only source of protein available. It gives me the subtle vibe that they can't imagine other people in the world can be healthy by eating differently without meat.

Maybe it was true a number of years ago but I wasn't around many vegans back then so I have no personal experience either.