When confronted, been hypocritical as always, he offered this absurd explanation:
I'm going to be taking many pictures with all of you and I don't really spend too much time looking at the signs and the t-shirts and the buttons. So I don't have anything particularly to say about a sign somebody else was holding...mydd.com
The only problem with this answer is that he is holding the damn sign himself and grinning from ear to ear. I bet if someone brought up a sign that said "There is no God" or "The Mormon Church is a dangerous cult", I doubt very much that he would help hold it up to have a picture taken. (I'm not saying the Mormon church is a dangerous cult, I am just making a hypothetical).
And what does it say about him if he really doesn't read the signs? He'll stand behind any sign, smiling approval without knowing what it says? Only an imbecile would do that. I am going to go out on a limb and say that he read that sign. Candidates are totally aware of the power of images; he'd be an utter moron not to have read it beforehand. On the other hand, I suppose he is a moron for comparing Obama to Osama bin laden.