There is a lot of horse pucky being written about right wing radio/blogs/etc. influencing the Arizona shooter. Go see this article from Politico to see what was really on Loughner's mind. He is a nutcase, pure and simple, according to his friends quoted at length in this column. Go here to see a photo of a "shrine" alleged to be in his backyard.
It is being reported in the Washington Post that Loughner is registered as an Independent and did not vote in November, 2010. That isn't the behavior of any right wing firebrand I'd recognize.
These, of course, are merely the facts. Don't expect them to get in the way of the moonbat left making hateful accusations.