Are you trying to advocate that it is all due to other circumstances and that blacks are not more likely to commit violent crimes than any other race?
You said rape and murder, and now you've shifted the terms to violent crimes. I provided an explanation for disparities in rape. I don't, as a general rule, think that blacks rape more than whites.
They do, however, on a statistical basis, commit homicides and aggravated assaults at a higher rate than whites (not 500% higher, however, I have no idea where you pulled that number from, and I don't think it's accurate).
And, I think that's due to the fact that blacks and hispanics tend to be much poorer than whites, and violent crime is intimately related to poverty.