Obama famously described himself as a blank screen onto which others projected their impressions. This worked for him for a long time. Now, it’s working against him.
But what if the people answering the surveys aren't sincere? One of his readers, William Kuhle, points out:
Surely some of those polled are against Obama and would respond in a way that would publicly tweak Obama, even though they know in their heart of hearts that he probably isn’t muslim. This polling behavior is, effectively, tit-for-tat, as Obama frequently does the same to his opponents
I think this is plausible, and a timely reminder that polls aren't always reliable guides even when you want them to be.