I think at this point we should just start calling them female supremacists. I mean they are starting in with the "Gay men are coming over here and taking our jobs!" rhetoric now.
The most tragic thing about this is that she isn't even using the word breedable correctly. The traditional meaning of the word, which she is trying to gatekeep, means to produce offspring. Humans breed by procreating with another human to create human children. Vaginas do not breed with other vaginas to create vagina children, so vaginas are not breedable.
Even if you think the slang form of the word breedable this guy used is invalid, he's still breedable as long as he's capable of impregnating someone, even if he has no desire to do so.