I'm not American and I have a question. There is a organisation named Southern Poverty Law Center and it monitors hate groups and condemns racism. But why "poverty" in its name? We all know meaning of word "poverty", but why this organisation has name referring to this social phenomenon?
Actually... it makes perfect sense.
If you get poor White people (who are also getting screwed) to work work together with Black people to topple the injust system, you start to get results.
There is a bit more history here...
In the American South, there were a fair amount of White people living in poverty. The colloquial term for them is "White trash". They were treated pretty badly by the White upper class, but the fact that they were White (and that Black people were treated worse) kept them in line.
If you want to deal with the basic injustice of the social system, providing help to White poor people makes a lot of sense.