I do not recall claiming that the Tea Party was wholly or even primarily motivated by racism. Which I assume is what you mean by "essentially racist", and is most certainly the goalpost Panzer is using when he's trying to demand proof of millions of people's mindsets or something from the Tea Party charter.

That's a strawman by Panzer which he's using to disprove (in his own mind at least) any noteworthy element of racism to the Tea Party movement, which is most undoubtedly really there.