Veganism by itself can be a healthy lifesyle choice IF PRACTICED CORRECTLY. Look at Jay Kordich. He’s been a vegan for over half his life, and you don’t see him or his wife Linda making fun of meat eaters or calling them petty, hurtful names. If more vegans conduced themselves in the way Jay Kordich does, then veganism would probably be so widespread that a majority of Americans would be vegan.
If you want to be a vegan for health reasons, then do it.
If you want to be a vegan for animal compassion reasons, then do it. I’m not telling people it’s wrong to be a vegan.
But it’s wrong to be a vegan and be such a fanatic about it that you bully and ridicule others who don’t adhere to your dogmatic, pragmatic hyperbole. If you decide to be such a fanatic about it that you resemble some Christian fundamentalist from the Westboro Baptist Church or fanatical Zionists, then I absolutely WILL oppose you and everything you stand for.
If you vegans want veganism to be treated respectfully, then you would behave more like Jay Kordich and less like Fred Phelps.