In my neighborhood, around the time of the OJ criminal trial verdict, a number of people (who very likely were also BO voters later) were looking at each other, nodding, and saying openly "He did it." They knew. But I'm sure they were glad he was acquitted, as news reports of their wild celebrations later revealed.
By the same token... these same people may have heard about doubts circulating about BO, but don't care, because "he won."