I am saying it is a socio-economic cause, not a racial cause.
If you are saying black people are violent, I would point out that most wars in human history have not been waged by black people. Especially in the last few centuries. Black people, as a race, tend to be on the receiving end of violence.
That's because blacks were never in a position to launch a war on par with the world wars we've had. There have been many, many wars in Africa, however, some of which are still occurring today.