This is classic wingnuttia. The Tea-partiers are complaining bitterly that Democrats are making unfounded accusations of racism.
“These people could be anybody. I wouldn’t put it past the Democrats to plant somebody there,” Mr. Robertson said. “They’re trying to label the tea party, but I’ve never seen any racial slurs.”
The post has a terrific punchline. It’s a picture of Mr Robertson.
I suppose his quote could have been honest. After all, he was standing behind the sign.