What I see in AZ is a mentally ill person committing a heinous and irrational act. Judging from this guy's writings, he was certifiable. He fits the template of so many like this - Fromm, Hinckley, Sirhan, Oswald - sick puppies, all of them.
That goes without saying. Liberalism is a mental disorder. What sane person would think they had any right spending someone else's money.