One factor is with white normies becoming much more aggressive and lower IQ, and then violent savage foreigners brought in.. the police have to become brutal to maintain order. The state will also respond to growing violence with brutally long prison sentences. Even if it doesn't work as a deterrent, by simply keeping violent males locked up for their whole lives it prevents them from doing more violent acts.
As the normies become more aggressive and lower IQ, they are also motivated by lower emotional drives, including the many millions of people who work for the state. In the book 1984, the goal of the party is to dominate, to use their state power to like stomp a man to death to show you are the superior and he is the inferior.