I suspect law abiding black citizens in gangland ghettos aren't doing most of the shootings either. What you've done here is to subdivide the whole American population into a group of "not many shooters" and "Higher proportion of shooters". Of course you can always do that, and always find a more specific group that dominates the statistics for any type of crime. But there's a worrying implication that we should somehow allow non-gang members to have guns but ban them from gang members. Or allow people in rich neighborhoods to have guns but ban them from ghettos. Or even, dare I say it, ban them from black people.

Really we need to ban guns from shooters. But there's no way to identify them without catching a lot of harmless people up in the same net. Even poor black gang members can be harmless.