I don't know. What evidence is there other than somebody saying something in a story?
I know they were protesting, but so were other groups (including the KKK, my bet is that these were that group and not TEA Party protesters).
What evidence is there that these people should be counted TEA Party protesters?
The KKK was taking part in the Kill The Bill rally? Really? Do you have any evidence of that other than the fact that some protesters were hurling racial epithets at black members of Congress?