Sorry, is this post satire or are you talking about satire you did not recognize? NEVER seen a vegan call breast milk non-vegan and have in fact actually seen more discussion about whether vegans should be breastfeeding children at all, I.e. is it healthy to do so with their diet.
You've put the word debate in quotation marks flippantly like there's an obvious answer, but I'm pretty sure you just misunderstood a conversation rife with sarcasm or taken out of context (or straight up made it up).
It just struck me as weird. Really strange thing to add in an edit considering the rest of the post, just extremely confusing in context.