Veganism is one of the only forms of political activism that people treat as if you're being a proselytizing, militant, asshole if you actually stand by your principles and speak up for and about animal rights, cruelty, and exploitation (and sometimes if you even just casually mention you're vegan) because they don't want to have to think about what they're participating in. People want to disparage veganism and vegans for being against meat-eating as if the mass cruelty of the animal agriculture industry isn't against a vegan's ethics and their meat just falls from the sky. You don't want to think about the cruelty needed to treat animals as products but instead want to encourage the continued funding of the cruelty while spreading misinformation, disinformation, and outright hostility towards vegans because we care about animals as other sentient beings and followed that to the conclusion that they shouldn't be slaughtered, experimented on, or used for entertainment.