There is no scientific evidence or study that supports that any racial group is more prone to violence than others because that group carries a variation or excess of certain genetic traits or markers. You can hypothesize all you want but there is nothing of that sort that I know of.
I have not commented because I’m not equipped (like you seem to claim to be) as to the nature versus nurture argument on violence in individuals. I’m willing to say I don’t know which predominates or how they fit together. On group behavior by race, I have listed the factors that are commonly attributed to explain why there is an obvious issue with violence in the black community. I’m not a sociologist or a geneticist. My personal belief is that in some combination those are the factors that play into the situation. I have seen ZERO to suggest as an explanation that some type of genetic makeup predominance in that group is a factor.
Again, if you have such a study, fess it up. I doubt you do.