Come on, I pray you're smarter than this. You're blaming the books he read? I own and have read two of those books, and they don't make me want to go out and kill people.
But those kind of books can contribute to an environment of hate against liberals where liberals are painted as subversive, mentally ill, anti-American, or whatever. I would draw a parallel with hardline Protestant preachers in Northern Ireland in the 1960's and early 1970's who preached that Catholics were 'subhuman', 'breeding like rabbits', that Catholics 'took their orders directly from the Pope who is the anti-Christ'. None of these preachers actually said 'It's ok to go out and kill Catholics' (they were too smart for that, but they knew what they were doing).
These preachers didn't PERSONALLY pull any triggers, or plant any bombs, but, yes, they bear part of the responsibility for terrorist activity during the Troubles.
Now the terrorists that may have been inspired by these preachers were largely psychopathic anyway, as this guy may well be also, and I am not implying that Savage, O'Reilly, et al, are complicit in murder. That would be an overly simplistic take on things, but, yes, they are partially to blame for creating that climate in the US which hopefully is now ended, where liberalism is a swear term, where questioning the President could brand you a traitor, or as Anitram put it:-
Anitram said:
Well when you have large portions of society that constantly demonize gays and liberals, then why are we surprised that some people buy into it and react in extreme ways?
or, at the very least, they are responsible in my opinion for cheapening the political discourse.