I think the issue is we really aren't discussing it. I started to acknowledge that earlier by saying that they "why" this guy decided to kill is more pressing than "how", but then let myself get distracted again.
While it's more pressing, it's also more difficult to unpack.
@First Time Poster makes a good start, but we really aren't picking up with it. Even now, I'm not really sure how to move the discussion forward.
There's a couple of dimensions to the problem, the explicit manifestation of racism and white supremacy with this shooting. And the implicit racism and white supremacy baked into assumptions, laws and cultural norms that have sort of permeated in our society over 300 years.
It's extremely difficult because it's nearly impossible to have a frank discussion about this sort of thing without getting defensive.