Every liberal does it too, from center right radlibs to far-right "conservatives": the most extreme right fringe liberals hate the mainstream liberals for not being bigoted enough, the mainstream libs hate the radlibs for not being cruel enough, and the radlibs hate the left for not being chauvinist enough.
Denouncing chauvinism in particular is like a liberal moral event horizon, a cardinal sin against their self-interested belief in the righteousness of the imperial hegemon that keeps the treats flowing at gunpoint.
I disagree. People dislike vegans because vegans (understandably) often get angry over an atrocity that other people don't see as an atrocity and insist on being abusive to people who disagree on subjective matters.
Libs don't dislike us for getting angry, they dislike us for a range of reasons, including disagreement on objective facts, contradicting material interests, subjugation to capitalist propaganda, etc. We shitpost and get mean, but I don't see us being abusive to people unless good faith discussion has already been long tried and failed.
I don't think this makes for a good distinction considering how much of politics is subjective matters
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I won't at all deny that society has historically been a lot more hostile to vegans than vice versa. I grew up a vegetarian me whole life and that got enough of that unwarranted abuse as it is. But I'll be honest, in my personal experience, I've met about a hundred vegans who weren't bothered to talk about it (but were frequently harassed by others for their veganism anyway), five vegans scream abuse at me, and between zero and one who wanted to engage in a conversation or saw me as someone to be convinced. I just think it's a different kettle of fish.