I'm sure the freed slaves didn't commit crimes when they were freed. When did it start to be a bad problem (especially in black neighborhoods)?
Was it because of the Black Panthers and Nation of Islam who misused the civil rights movement and turned it into a black power movement?
"Great switch" under Lyndon Johnson. The Demonrats started saying, "we love black people" and promoting degeneracy to them. They bought it because many black people really like to party and degeneracy is great fun at one. They just never bought into the homosexual movement because the concept of a real man still exists in their culture.
So from the 1940s 1950s where you have almost all black families with two parents and doing crime at a normal rate like everyone, boom 1970 most have 1 parent and crime is everywhere, and boom today almost all only have one parent and they burn down their crime ridden-neighborhoods in crimes to protest police dealing with criminals in the act of committing crimes.
The democrats give them every win they can to encourage it and free stuff. They spend billions on promoting homosexuality, but luckily most black guys aren't falling for it, though "whatever I don't care what they do" is a new phenomenon spreading because apparently they think a lesbian rapper is good, and so maybe that last bastion is indeed falling.