“Except he obviously is. There is no shame in putting a cross into an ad about Christmas.”
Nor is there same in calling a book shelf for what it is..
If no one involved in the filming of the ad, neither the set designer, nor the art director, nor the producer, nor the director, nor the cameraman, nor the representatives from the Huckabee campaign nor especially Huckabee himself noticed the great, big, honking cross design on the book shelf in the background, then they’re incompetent. And someone who is too incompetent to produce a 30-second ad without an obvious, unwanted subliminal message embedded in it has no business being leader of the free world.
If, however, they put the cross in the ad deliberately, they’re obfuscating, to put it nicely. So, your choice—incompetent or obfuscating, one or the other.