He basically told all the racists, homophobes, transphobes, xenophobes, and anyone else who feels they're entitled to more than anyone else that they were right and they don't need to maintain any air of dignity or even basic human compassion about it anymore.

Look at that list and you'll see it's all people who base their whole identity around hatred of things they're afraid of or don't understand. That's what he tapped into, ignorance and fear.