Maybe not, but the fact remains that it doesn't matter who the shooter is, the problem that these shootings are still a regularity in this country but nobody (NRA, Republicans, white males) are doing anything to prevent it.
But you know how Trump supporters are saying these shootings are being staged by Democrats to further push their anti-gun agendas for political gain? How do we know it's not Republicans staging these shootings to push their pro-gun agendas? Because notice whenever these shootings happen, their response is always the same: "See? If the teachers or even the students had guns of their own, this wouldn't have happened!" How do we know these shootings aren't just commercials for the NRA to sell guns to Americans?
We don't. Because that's just stupid. Just like their conspiracy theory that the shootings are staged, the dead bodies are dummies, and the survivors are crisis actors.