His mother said he was mental (so did his step dad). We could point out several mass killers who were lib wackos in the last few years as well. There are nuts on both sides.
I wasn't trying to imply that Tea Party = whackadoodle. But this guy did align himself with the Tea Party - at least at some point. In general, the guy clearly has issues. I mean just off the top, you know he's getting evicted so he must have been under some desperate financial stresses. Though I read somewhere last night that he apparently quit his job.
Frankly, I think when you start shooting up people like that in general you're probably a whackadoodle - just like the Joker guy in Aurora or Loughner in Arizona. To do something like that means you have issues, or at least it does to me. I don't try and assign everything as a left or right whatever.
Plus it doesn't appear that he updated his FB much at all in the last year or so, so I really wouldn't put much stock into reading a motivation for his actions off of it.