The Post Millennial story clearly shows Twigg, the roommate, to be the crazier one. Why Robinson was the one to shoot Charlie is a real poser.
The left knew that if a woman, racial minority, or trans person were to be the shooter, the political motivation would be too obvious to deny. So they recruit disaffected white males from conservative families. Then when that disaffected white male does the deed, they try and say "oh, no, it wasn't us, you fragged yourselves!"