There is a whole lot of misunderstanding here. I didn't even mention toxic masculinity, but I'm assuming you mean the asshole male Doms. The comparison begins and ends with too many of them being wholly unpleasant about it, and so when I hear someone say either of those things, I approach it with caution. That's it. That's what a yellow flag is

I've already clarified on this and other comment chains how I do recognize the bias in how the annoying vegans are the ones I know about, and how I don't know the vegans that don't make it my problem. I do not think that vegans existing. There is no "whether or not they've said something"; it's explicitly ABOUT them saying something. That's the problem

I don't know how to make it clearer than that. I don't care of someone is a vegan; If someone goes out of their way to talk about their veganism, I raise an eyebrow; If a vegan brings it up to insist their way of life is better, that's a red flag

Edit to add: Reading back on the comments, I wanna add further clarification that the original commenter who was "the annoying vegan" stereotype was such because I mentioned my green flag, and they insisted that veganism should be a part of that green flag. It isn't to me, and one does not get to tell me what my green flags are. That's that vegan moral superiority at work. I didn't bring up my diet, and the implication sure felt like "If you aren't vegan, your 'empathy towards animals' isn't real"