My point is that c/omnivore would still get constantly brigaded by vegans

If anyone posted trolling shit like this to /c/vegan about veganism being bad, they'd get banned. The same would apply to /c/omnivore. Rule 1: no vegan concern trolling. That's why a name change is needed. If the community is explicitly non-vegan, then vegans have no business being here, as opposed to a neutral sounding "food" community.

Making this /c/veganfood leaves no regular food community. And again, vegans already have their own community.