There are a couple of unique dynamics at play here with this story.
When these shootings occur, people attempt to attribute motive to some indirect causal link based on something the other side did or said.
Some people attribute it to "anti-Gay sentiment stirred up" by a K-3 public school policy passed a thousand miles away
Some people attribute it to overall backlash to the concept of "groomers" (which claims in that regard span the spectrum of "eyeroll <-> credible")
However, based on
this article, it sounds like the shooter's troubles started much earlier than any public backlash over "child-friendly" drag shows, or any sort of public discourse about a bill prohibiting sex subjects k-3.
-Troubled childhood (due to divorce and constant moving)
-Parents with drug issues
-Their own drug issues
-History of mental illness and making violent threats
-Father admitted he voiced strong disapproval of gay people all throughout the shooter's childhood
I think that people missing the forest for the trees (or at worst, trying to use a tragedy for a self-serving political purpose) if they're trying to make this about "predictable backlash over something the other side did" or claiming that "this policy from a governor we don't like emboldened them to do it"
In the case of this shooter, it seems as if all the "kindling" was there for this sort of erratic behavior to occur, regardless of anything that's happened with the "hostile politics" in the past 3 years.