I know a lot of racist folk, some more low key than others, but I have never met someone who was filled with so much racist vitriol that they would go and shoot up any black people, let alone a church.
All I can say to that is that I'm glad you haven't, or at least haven't noticed you have. I've been around more people than I'd like that were only a couple notches of social approbation from picking up a gun and going hunting.
You have to remember gg, the last public hanging of a black person is still in living memory. My grandfather's old enough to remember that year, and still kicking. Lot of the folks of the generations that came from that area and shortly thereafter are... not as distanced from the beliefs that lead to stuff like that as a lot of us would like. Less willing to be open about it, 'cause the social tide as turned pretty hard against it, but it's still there. And as this incident shows, it can still pass on to the younger generations
I can't logically comprehend a healthy mind finding that an appropriate response, no matter how bad things are down here.
*shrugs* When you genuinely believe that a social group are rapists and all that racist bugshit, violence of that sort becomes more understandable. You, happily enough, believe the premises that sort of thing builds itself off are false. Folks like the guy in question didn't, and, well. What happened happened.