Is it really that hard for you to accept that some principled people may be genuinely against something that you tolerate?
You’re seeing more of it recently because veganism is actually on the rise, both because awareness about speciesism is rising and because of climate concerns. Plus you’re on the fediverse, where the concentration of principled radical leftists is higher than other platforms.
when human beings will also willingly put themselves into idiotic groups that do idiotic things
And is this one of those idiotic things? Are you implying trying to reduce animal cruelty in the world is idiotic?