A sense of superiority due to status (including race, wealth, etc), and ability, is a stepping stone on the way to lessening the worth, and so humanity, of others.
It's human nature. We just love to belong to a group of people and think it's the bestest group of people ever.
Thanks to that we have a pretty advanced society, unlike any other being on the planet. And we also have ethnic cleansings, religious prosecution, terrorism... Also unlike any other being on the planet.
In a moment of weakness, I joined a high-IQ group (Triple Nine Society). The whole mailing list was just people having the same political arguments that were on the rest of social media, just with a bigger vocabulary.