Are you really comparing blacks, who were brought in chains to America, to Russians, who invaded and imposed their will on Ukraine? And murdered millions of Ukrainians?
There is not a single black in America that was “brought in chains”. The last one died generations ago.
Further, the vast majority of current blacks in the US are descended from immigrants who willingly came to this country.
This “Russians should go back to Russia” meme is the precursor to ethnic cleansing . Start that in Ukraine and you will really see what Russia will do.