Let me begin by saying that I think the way you have commandeered this thread is actually pretty ok. I think you have a point, and an important one. I'm not sure the important point is the one you really wanted to make, but it's still valuable. The fact is that lots of people are shot every single day in America. Most of them don't make headlines because it's just so common. That's an important point.
When it comes to race, what people had in mind for this thread was a single thread devoted to the cases like Columbine or San Bernardino or Palmdale (Palmdale? The place in Florida. Seventeen dead. March for Our Lives. That one.) where a gunman opens up in an attempt to kill as many people as possible before they are gunned down, captured, or commit suicide. It's interesting to me that with so many examples, I can't recall a black shooter in any of them.