Money, power, control, and anti-intellectual indoctrination.
The Rats need a subservient, reliable underclass to keep them in power to fix the problems they create, and fight for them.
Conditioned behavior has been ingrained - job well done. This video explains it very well: Yuri Bezmenov, a video on propaganda techniques used by the KGB (useful idiots):
“My question is, what the heck happened over the last 30 years? Why don’t more black people understand what’s written here?”
Public School education became a tool to spread liberal propaganda. Too many people’s minds are mush.