Why speculate on his ideology and place blame with one side or the other? So he was a supporter of the gold standard - does that mean we should blame Ron Paul? No the only person to blame is this man.
This is why we need more research funding for mental health issues. It is clear that he has persecutory delusions, a symptom of schizophrenia and bipolar disorder. That is not to say that we can say he blameless, because he is guilty. That is also not to say that all people with those disorders can be dangerous because the vast majority aren't. But if we ever had a treatment for these types of disorders that was effective then the world would be a better place.