"Tea partiers" come from the omnipresent group of homegrown racists that always resents redistribution of tax income to help the poor. But who don't begrudge the money to blow up non-whites in parts of the world they will never visit. There wouldn't be any "tea parties" if the US had a caucasian president--the current activism of these whiners is exacerbated by their fear of a "minority takeover."
The US media supports this ostensible movement to (a) sell papers, and (b) create an appearance of "balance" even though progressives have yet to enact any legislation that couldn't have been passed in the Bush era.