Herd immunity
Too many humans, from young ages, are taught to normalise abuse, cruelty, and discrimination of various kinds. While, in recent human history, we have gained awareness about discrimination against our fellow humans, we are still unaware and/or insensitive to discrimination against non-human animals. When you have such a large human animal population that is insensitive to non-human animal cruelty (aka herd immunity), it is hard to have a real, honest conversation about animal rights. For example, animal rights advocates have to explain why sexual assault of non-human animal is cruel. Why taking babies away from mother pigs or mother cows is cruel.