There's a much easier explanation than that: self-interest.
Oprah's a very bright businesswoman. She can see the danger of trying to get in the middle of a fight like this one.
If she took a political stance, there'd be no winning. Her "brand" is that she's a woman's woman. I think she'd lose a lot of her following if she allowed herself to be tarnished by the fact that she'd "gone political."
Yeah, sure, she's an unabashed Democrat, but her attraction isn't really political. To jump into a fight between Obama and Hillary would ruin her image.
Some believe that Oprah did not expect the feminist backlash on her website. Co-ordinated by the Clinton police ?
Thus Oprah went from racist to shutting up overnight.
Silence in NH and beyond.
Her "brightness" must be show business brightness only. Why the hell did she think she could take on the Toons. Kind of funny that she's gotten her ass chewed up. They eat lightweights like her for a snack.