I don't think that's true for all or even most vegans. Most vegans I know will lightly chide me to eat less animal products, and they'll list the benefits. I'm okay with that, especially because, well... they're right.

I say that because a lot of the vegans I know will explain a lot about the global socioeconomic conditions that make veganism and vegetarianism harder in poorer places.

I dunno, man, I feel like the most they're trying to do is be smug, and that's not that big of a deal to me, lol.