Leftist babble.
T-shirts - this is how the left operates, and they have a long history of projecting - and decrying in others - actions they themselves are about to perform. It prevents the opposition from using the accusation else they sound like parrots. Very effective, especially among the sheep. This story itself is most likely an example of pretending to be a Tea Party member and in fact actually being a leftist plant.
Breitbart - as much as the leftists hate Palin, Breitbart scares them more simply because he is able to expose the left's actions to subvert this country so effectively.
Reptilian brain vs. logic - classic fear politics of the left