From what I have read, the root causes of Loughner's rage are as follows:
Extreme hatred of George Bush.
Belief that 911 was an inside job perpetrated by the government .... he was a 911 truther.
Economic frustration ... he couldn't hold or find a fulfilling job.
Social rejection.
Extreme hatred of women .... misogyny.
.... I'm still looking for evidence of corrosive political discourse as a root cause. I'm still looking for evidence that he was inspired by Palin, Beck, Limbaugh, Savage, Hannity, or Oreilly.
Yet it appears that J. Eric Fuller is using his victim-hood mentality and his actual victim-hood to justify his preconceived notions and hatred of Glenn Beck.