I would suggest that blacks and everyone else re-read world history and remember all the cultures and people who were made slaves and were slaughtered throughout time. One can start with the Jewish people. As I recall, throughout time, armies conquered lands and made slaves of the people they conquered. Considering world history, one would think that all of us could stay enraged all the time over past history. As a Jew, the Holocaust comes to mind.
Every race on earth has at one time held slaves or been slaves. No race is “more” guilty than another. Unless you are a socialist.