This man is a scumbag and got off far lighter than a Muslim or other minority would have in the same situation, which is not cool. It is good that he's been convicted and will be going to jail.
HOWEVER
While I disagree with the Tea Party's ideology, tone, and rhetoric, the fact that this man agreed with them doesn't reflect on them in my view any more than BTK reflects poorly on the Evangelical Lutheran Church in America or Robert John Bardo, Mark David Chapman, and John Hinkley, Jr. reflect poorly on J.D. Salinger. Scumbags and the mentally ill come in all forms and any sufficiently large sample is going to have at least one rapist or murderer in it. If it is not OK for righties to point to rapists or violent elements in OWS and use them decry the whole movement, then it is not OK period.