I haven't personally done any genetics research regarding its impact on violent behavior. But only a fool would dismiss its influence altogether.
I do think that if environmental influence were better than it is, the statistical anomaly of one community's criminal activity would look way better than it does. Unfortunately, low-IQ, leftist scum like yourself blaming some imaginary system holding people down as the excuse for disproportionate violent crime is just an ignorant way of excusing people from their individual responsibility for their actions.