I only perhaps shed a little bit of light, but many opinions are needed here. I would say that it has to do with the “Supreme” part of white supremacy. The top of the heap is the white male, the King. His privilege by birthright is to rule over everyone. In America, the King approved laws to put black women on the bottom of the hierarchy (like the actual King of Britain who has to “assent” or approve” all the laws of each “colony,” which were actually British territories or British own states ruled over by him. When the King after Bacon’s Rebellion in 1676 started passing laws in Virginia for sample, resulting in the Virginia Book of Laws of 1705 where they were all collected in, he legally put black women on the bottom, along with black men.
But an unintended consequence was that any black woman who had a baby automatically had a “slave baby.” Previously, a woman having a baby by the man meant that first born male would inherit the estate, and any baby born to a freed black woman would be free. The laws changed from black women, which meant any baby born from her was a slave, given a “title” that carried monetary value, no matter the father. That meant white men literally could produce wealth from the children from a slave they owned, whether the father was a freed black man, an enslaved black man, or the white owner himself. If the owner let’s say “forcibly took” this black owned slave, and she had a baby, the baby was automatically considered “black” and a “title slave,” of chattel, no matter the skin color. That meant the father/owner could sell the child for what today would be $10K or $25,000 depending on the market. In that way, he literally could produce wealth from his “right” from owning the black female slave.
That system of chattel ownership lasted for almost two hundred years, producing a conditioned sense of entitlement and privilege over black women that white men saw in black women. The white male entitlement over black American males conditioned the whites toward violence and the right to conduct violence and slurs in those same two hundred years (or three hundred) but the enslaved black males couldn’t produce such wealth as an enslaved titled black woman could. Thus, I think the white daily psychological conditioning from this ownership and wealth generation structure made white men even more upset from hearing “back talk” from black women, who they felt they had a “sexual” right over. Trump is, like many Southern white men, a supremacist privileged white male, and he takes advantage of any women, and has taken advantage of a black woman “girlfriend” before.
OK, that’s my historical two-cents analysis. Thanks for listening.