Let's try to sow unity instead of division.

I've gone vegan before. Mostly because I think animals are gross and carry disease as opposed to doing it for ethical reasons. I also love steak and feed my snakes mice. Everyone is different. Stupid people will be stupid and people without empathy will be cruel. I grew up in a rough neighborhood where I knew of not one but two different men who beat their dogs and one, I believe, to death. Neither vegan as far as I know. Ostracizing a certain group will only make them band together more strongly. Empirically speaking. I know personal experience can make a ton of self-righteous hate. I can't speak to what you've seen. But the majority of people in any group are just normal folk unless it's religion or a cult. The broader the group the more normal people within it. You're criticizing a diet choice for fucks sake. Everyone is going to have different reasons. I know a very cool person (a practicing vet in fact) that is vegan because her body can't process fats or oils found in almost every animal product.

If you really feel for animals that this happens to you should try to make change and be involved. Educate people. Fuck, there's no way you'd ever care to, but you could go to vegan events and educate people on why some animals cannot survive a vegan diet.

Make the problem better.

Or just keep spreading hate and exclusion and making the problem worse.