Trump hates Obamacare, not because of the policy, but because it was signed by a Black man.
In the same way, he calls Harris stupid, not because of anything inherent about her intelligence, but because she is a Black woman.
He literally thinks he is smart because of the color of his skin.
Considering how he makes his skin darker with makeup, shows you the conflict he has about his own whiteness.
He is a man at war with his own stupidity.