A Russian who moved here in 1998 certainly didn’t have anything to do with racism. But he is participating in a society that claims to be a just one, in which he will get preferential treatment over a Black person just because the color of his skin. Is that his fault? No. Is it his moral responsibility as a participant in society to help create a more just society? Yes.
Then you're responsible for the climate problem, the extermination of native Americans, the Vietnamese death, the Iraqi deaths, etc... ? From what you preached you can only answer "yes" to all these. Then : what do you do to make amends for all those horrible crimes?
Other countries and people need not and should not accept sharing the blame for US sins against black people.