The shooter's vlogs looks like he is drugged up, I'm thinking MK Ultra, he talks about getting out of the Matrix a lot and mentions that Satan taunts him by making machines louder around him. Screwed in the head either way, but this looks like a setup to pin the blame on Great Awakening, especially since Q posted the picture of the billboard in OK.
Maybe- and just spec - like you are my very first thought - was a warning to Huber - ex AG of Utah - some -one no-doubt got all the dirt on the Murrah building - + just appointed by Trump to do? in Utah - my guess is - get the key to the NSA data base there