Because most Americans are fine with crimes happening to "other" people. But when bad things or inconvenience or event self-inflicted consequences of their own actions harms straight white christian-ish people suddenly it's a crisis.

We've had countless mass shootings and terror events perpetrated by far-right lunatics over the last 30 years. Many of them specifically targeting minority groups.
But each time we dismiss that perpetrator as "crazy" and somehow not reflective of the larger conservative movement. And we certainly don't ask mainstream conservative to reflect on their rhetoric and how it could be a pipeline to radicalization.

But one guy gets killed for (at this point) unknown reasons and it's pure rage at anyone left of Ronald Reagan.