I didn't answer your question because it was not germane to the discussion. Whether or not there is are innate differences in tendency, behavior is quite malleable via the proper culture, institutions, and law enforcement. But if you really want an answer I will try to humor you.
"I am asking a different question. To be blunt, which contributes more to the current lack of "civilizing influences" in inner-cities: that the actors involved are black, or that the actors involved were born into the same lack of "civilizing influences" 20 years earlier?"
To be even more blunt, I take it you asking whether black genes matter more or whether the environmental conditions matter more? It is not really possible to answer that question along a comparative axis of "more or less." With most human traits, genes determine both the slope of the improvement curve and where the improvement curve plateaus. Environment determines where one is along that curve. I cannot throw a javelin 80 meters. Which matters more, genes or the fact that I have never trained to throw the javelin? That's not really a well put question. I'm sure with training I could throw it 40 meters, I highly doubt I have the genes to ever be able to throw it a world-class 80 meters.
Similarly with African-American neighborhoods -- I think they have the genes to have peaceful, orderly neighborhoods because such neighborhoods have existed in the African-American population before. I am pessimistic that there will ever be an African or African-American Pudong or Silicon Valley, because I don't think the concentration of genes are there. I would love to be proven wrong, but I think more evidence backs that view than not ( https://jaymans.wordpress.com/jaymans-race-inheritance-and-i... https://liberalbiorealism.wordpress.com/2009/10/07/the-likel... )
Most likely, there are statistical differences in gene frequency that make average behavioral traits differ between the races, all things being equal. I say that, because the world looks exactly like you would expect, were that hypothesis to be true. When you compare races, such as the Han Chinese, the Irish, and Africans, the Chinese tend to be the most orderly, regardless of where they live (China, Singapore, Taiwan, the American Chinatowns, etc) whereas those of African descent tend to have higher rates of crime and disorder, no matter whether it be Johannesburg, Belize, Rio, Liberia, Jamaica, Haiti, or Madison, Wisconsin. Worldwide, race predicts crime better than anything else.
But given the right conditions, Chinese can be quite disorderly. And we have proven cases in the past of black communities being quite disorderly. So regardless of the genetic tendencies, the outcomes are malleable.