The belief in the superiority of one group over another is anathema, especially when it involves dehumanizing one group.
The implication that people are subhuman has often been a precursor to enslavement, genocide, or removal of rights. I'm not suggesting that is what either you or equestrian were implying or going for. You probably just mean it as an insult, not that the people who disagree with you shouldn't have the right to vote or anything like that. However, it is best to call out such sentiments before they bear fruit.