I didn’t see anything Raciest in the guys post.
It's not clear whether his "take your black asses back to Africa" comment refers to ALL black people or just the BLM crowd. If it's the former then yes it is racist to suggest that the respectable law-abiding blacks have no place in American society. If it's the latter I have no problem with it.
Dude also needs to read a history book if he thinks American Indians were the only group that was ever mistreated in American history. Slavery was brutal for the majority of black slaves even if some slave owners weren't as bad. There was also the Chinese Exclusion Act, the Japanese internment camps, and indentured servitude of various white ethnic groups. If someone denies the Holocaust happened or tries to whitewash it we call him an anti-Semite. By extension then someone who tries to whitewash slavery or deny its existence is an anti-black racist.
i think in context of their discussion its clear to what group the remarks were aimed at.
Make sure you me tion the several thousand black slave owners and also that the first slaveholder in America was black.
Dont also forget to discuss the irish slave trade and the massive deaths and atrocities committed by the british to them, they did a super job at almost wiping them out as a people.