Veganism is in its core a boycott

Yes, it’s about boycotting animal products and abuse of animals. But from my perspective, that doesn’t necessarily mean that you must boycott everything that is indirectly related to it. Of course you are free to do that but if your moral compass only considers 100% vegan restaurants acceptable, wouldn’t the same rules apply to supermarkets, hardware stores, workplaces, service providers, friends, family etc.?

If you cut all ties to the non-vegan world, you’ll… a) find yourself pretty isolated and b) will be having a hard time to inspire non-vegans to jump on board

offensive to me as an anarchist. I strongly dislike businesses, business owners and I like to do things for myself

That’s fine and I’m also on board with many of these things. Still, being an anarchist or anti-capitalist isn’t a prequisite to become vegan. IMO also Donald Trump can (and should!) become vegan, independent of his political world view. I guess we both agree that his other political world view is pretty fucked up but that should be seen independent of his veganism status.

I think adding meat dishes to a vegan restaurant and still calling it vegan is offensive and anti-vegan.

100% agree. But from my perspective, neither myself nor any of the other commenters did call that restaurant vegan. That was never up for debate.

I don’t think you’d be a good fit for a community of radical vegans and anti capitalists

If the community was called ‘c/radicalanticapitalistvegans’ I’d agree. But neither the title nor the description nor the community rules imply that ‘c/vegan’ is adressing only this target audience.