Well yeah, most extremism is crazy and veganism is basically vegetarian extremism ๐คท
Not saying that you can't have some extremist views without being crazy (I myself am a pacifist, which is increasingly considered an extremist view), though the proselytizing ones tend to be at least a LITTLE unhinged..
What's extreme about not paying people to send animals to gas chambers or chop their heads off? Seems like consuming animals is more extreme than being vegan.