...is still a bully.
If someone sounds like a bully, acts like a bully, and makes others feel like they've been bullied, well, that person is probably a bully. Doesn't matter if they're vegan, or if they have the best of intentions, or are bullying to make things better for those who can't, it's still bullying. Playing the blame and shame game (and believe me, I'm guilty of this too many times as well, and in fact may be doing it right now!) is not gonna work.
People instinctively KNOW when they're being bullied (even if they don't identify it as such), and they rightfully don't like it. So whether your name is Tom (no, not YOU Tom, snort), Dick, or Gary, cut it out already. Watch out for bullying tendencies, whatever your name. It's a matter of degree, and those of us passionate about a cause are possibly even more prone to it, so be careful. And yes, I'm including myself here.