And, are you honestly going to suggest that African Americans would be better off if their ancestors had never been brought to America? You're delusional.
And, sir, you are the embarrassment. You're like every other liberal I've known, viz., you don't mind freedom of speech as long as it's your speech that is free.
And, finally, lesson #4 to the peanut gallery: We are not saying the slaves brought to America should have been thankful. We are saying what educated, conservative African Americans have already said, viz., that the descendants of slavery in America are much better off than if they had been born in Africa.
Try to keep up.