Win 73, in your earlier post you said, "The traffic was thick so the hole I cut into wasn't very big." Now you say you had perfectly safe and adequate room. Those statements do not agree well.
One of my personal peeves is the driver who assumes that because he has signalled, he can now do what he wants. Signals and wants do not equal right of way.
I would not blame the guy for being annoyed the first time you cut him off. Twice? Not a good idea, and not courteous by any stretch.
I think your assumption that your race, and not your behavior, offended the other driver is offensive.