the first slave in the US was owned by a black man. We know this because he challenged in court to change the law to keep the guy enslaved.

Idiot. The first slave was not owned by a black man, the first court case about keeping a man enslaved was brought by a black man. That black man was not the first person lined up to purchase his slave, and there's nothing to support your claim. Get your facts straight, you were so fucking close but ultimately wrong.