well, the facts are that the shot would not have taken a pro sniper to do, just a someone trained adequately, 200 yards is not a hard distance with a scope and a 303 or 308 cal and by the amount of superficial damage i'm betting they were hollowed, also likely the bullet hit his shoulderblade and again, this seems indicative of the bullet being an expanding tip of some sort. probably not a FMJ.
remote control assassins is pretty much proven, i saw a video where a hypnotist demonstrated doing it, using hypnosis to train the shooter really quickly (which was part of the go signal trigger) and the individual "blanked out" while they were doing it. so, yeah, hypnotising someone to shoot on a signal is easy to do, and someone with susceptibility to hypnosis, very easy to implant all the ideas to write all that stuff, the manifesto, the bullet engravings, etc.
meanwhile, the people who orchestrate it sit comfortably distant while their wingnut takes the heat for them.
OR, the evidence was created like this in order to mislead the investigators, that seems more likely, and that the shooter was a trained covert operative, a mercenary, who was given loads of money and help and guarantees to escape without being found. either way, it's covert ops, spooks, and psychological operations, one on the public, the other on the shooter and the public.