I think that the slander "racist" is thrown around indiscriminately, against anyone who is white who organizes against the government.
In your own post, you made the statement that since 90% of the Tea Partiers were white, it must evidence that they are racists. Its a fraudulent association. If there was an organization that is 90% of Black, or 90% Mestizo, or 90% Jewish, or even a 90% Non-White, regardless of background, would you use that as evidence that said organization is racist. If your answer is no, then its hypocrisy.
As an aside, the CNN poll states that the Tea Partier movement is 80% white, 10% hispanic, 2% Black, 8% other. And of course these are self-identifications. There is no reason to assume these percentages are in line with true racial background.
Basically, the Tea Partiers just want to be left alone by the government, and I don't think they have much more ideology than that. Less Government, Less Taxes, Less Bureacracy, less government Social Engineering, thats the tea partier goal. Because, this is in direct contradiction of the Multicults program, more government to make more social Engineering, enforced by thugs with guns and billy clubs at any expense, the Tea Partiers are on the firing line. However the Multicult can't just come out and say, "you want too much freedom, you want too much liberty" they instead call them Racists. And Academia, supports this by defining Racist as anyone who doesn't want to be socially engineered.
The people on SF who call themselves WN, for the most part, just want to be left alone by the government, they don't want to be social engineered either. However, because social engineering is painful and oppressive, many people are radicallized and pushed into a rage, and basically provoked into being "mean". And then of course the Multicult points to the result while ignoring the cause.