I escaped the Reddit regime a little while ago. I consider myself a marxist-leninist-MZT. Vegetarian and vegan for a few years. I've a lot of thoughts on how marxism and veganism are connected. Never wrote them down. I'd like to start smth like a club for marxist vegans to develop our own proletarian theory. Most vegan theory I found is either openly bourgeois (Francione is a literal TERF) or revisionist (anti-China, anarchist, libertarian). How about fixing this?
I think we should think very carefully about tamping down on Marxist viewpoints for the sake of unity, on a case by case basis. Just because we do it for one thing doesn't necessarily mean we should do it for another. In the case of brow-beating religious people with dia-mat, i think the case for unity over discourse is valid because atheists are not an oppressed minority that we should fight over or risk losing from the movement. This is also the case of vegans. Animals are an oppressed minority, yes, but they cannot join our movement, and so we can't risk losing them from our movement if we don't steadfastly defend them.
I mention this because if you're not careful you could apply this logic where it actually matters, like racial or gender oppression. Should we handle racism with kid gloves because it might cause division and scare off white people? No! Because then we risk losing oppressed racial and gender minorities from the movement for not defending them.