How do you know this?
There have been people who pretend to be Tea Partiers in order to make the Tea Party look bad - people who carry racist signs, for instance - but they are quickly identified by other Tea Partiers because they just don’t fit the OVERWHELMING pro-America, pro-Constitution profile of the other Tea Partiers. I don’t think you’d be able to find 1 in 10 of those people voting for Obama after they took the time to attend rallies and publicly subjected themselves to the libel as well as the threat of Homeland Security considering them potential terrorists.
At best, there might be fakers who told exit pollsters they were Tea Party people who voted for Obama, but that would only be an illusion and wouldn’t explain the numbers that contradict what people observed regarding early voter turnout and polls taken in the run-up to the election.
I seen and heard this type my whole life. That is why it doesn’t surprise me. Don’t fret, it is actually a good sign. The larger a movement is, the more outliers like this you will have. It is proof that the movement is strong. Once you have attracted a small percent of morons to your movement, you know you are here to stay.