Given how things have been going in trump's favor (immunity, Dem disarray/the media), it's a little hard to imagine this being a false flag.
It wouldn't surprise me if it was a disillusioned 'pro-lifer' or disgruntled qultist, likewise if it was a guy out to 'save' democracy.
Of course- someone who's mentally ill, or just seeking fame/infamy are always good possibilities. Less so in this case- a nation-state actor.
Buuut, I'd put equal odds on it being a
f🤬cking boogaloo.