Brain owned by Tucker Carlson?
I know nothing about the shooter. Not seeking to justify anything he has done. But my guess is he has emerged from a part of US culture that is dangerously angry about what they perceive as damage to traditional American culture.
So I don't dismiss some people's concerns about very large scale immigration having some negative consequences. Not sure if that's happening in the US any more. But many perceive it to be the case. And people at the bottom end of the economic scale can suffer ill effects from the introduction of mass quantities of cheap labour.
That isn't quite the same thing as being anti-immigration, as it all depends upon scale. I don't think it's intrinsically racist, either. Striking a balance is a long-running theme of US immigration policy. It used to be waves of Irish and Italians that caused tensions. I think quite a big chunk of the rage is to do with something quite different: gross inequality. The sense that some folks do very well and others not so well from federal policies, and the not-so-wellers think their situation is dismissed.
Having said that, it clearly does in many cases, end up being conflated with racial issues, which is both sad and stupid.
As I said, I don't know if this has anything to do with the shooter. But I think this issue keeps rumbling on.
It's also difficult because I think many Americans also pride themselves on their willingness to absorb a lot of immigrants and see them as an asset. It's sorta the centrepiece of that America's sense of self.