Whites freed the slaves in the US and whites ended Jim Crow.You only make it clear that have no good retort to the question of what's wrong with tearing down and pissing on a culture that venerates slavers. You only have cartoon replies. The slavers had to be defeated and then the segregationists after them for black Americans to live in at least the facsimile of equality.
Your arguments, while they might satisfy your little cuck feelings are not represented anywhere in the mainstream. No one considered decent or moral would suggest black people should be thankful to slavers. It a view held by mutants and deplorables that most people, even conservatives in the mainstream, who want to remain there, would denounce a deeply deplorable belief like that. In otherwords you've chosen to take what is ultimately the loser position and I applaud and support you in that.