Konstantin: "So it is the african americans who commit most of the crimes? This is what most people before have mentioned. But no one has said: WHY? Why do african americans statisticly commit crimes more often than white people?"
No, African Americans do not commit most of the crimes. I hope that's not what others here inferred from what I said. Blacks (I prefer to use that term rather than the hyphenated "African-American")
do commit crimes at a disproportionate rate, though. Blacks comprise roughly 12% of the population but commit over 40% of crimes here in the US. In Milwaukee that rate is even higher.
There are a number of reasons for this: drugs, unwed mothers, poverty, welfare, and I'll leave myself open for criticism by saying that the current black leadership has given the criminal element of their communities a "pass."
An example: the rate of single-parent (unwed mothers) homes for blacks in the US is over 60%. In the area of Milwaukee that I cited previously the rate is over 80%. Compare this to the rate for whites of a bit over 30%. Former US Senator Daniel Patrick Moynihan, who is not held in high esteem on TFL, nevertheless was very prescient when in the 1960's he predicted that the rate of single-parent households would climb to the levels we're at now.
In the 1960's the single-parent rate for blacks was just over 30% and for whites it was under 10%, IIRC.
How did this happen? One tremendous contributing factor was President Johnson's "Great Society" program, which created welfare programs that rewarded unwed motherhood, as well as discouraged people from looking for jobs. Why take a minimum-wage entry level job when you can make more money by staying home and collecting welfare? And the more kids you have, the more money you get.
Another factor contributing to unwed mother status (which does translate into the children committing crimes) is the fact that something like three out of every five black men are either in prison or have been in prison. It's an astonishing number.
And (putting on flame suit) there's also a tendency for black males to just take off if the woman gets pregnant. I'm not saying that white or Hispanic males don't do the same thing, but it's far more common for black males. Why, I don't know.
Black leaders like Jesse Jackson and Al Sharpton refuse to confront these issues head-on, instead opting to blame all the problems of the black community on whites. Until the black community turns to leaders with real solutions, nothing will change.
Disclaimer: I don't have a degree in sociology. If I did, I'd probably be a liberal and wouldn't even be on TFL.