Most people only ever hear anything from the extremists so you get painted with the same brush. I have friends who are vegans who are amazing people. I go out of my way to accommodate them. You are getting hate because of a very small group of fanatics who believe that they are absolutely morally superior and that that absolute moral superiority justified doing and saying anything to anyone who doesn’t agree with them in an attempt to shame, harass, and intimidate them into doing what they are told.