I think you're underestimating the impact the media has on people, Stoney. If the right are making it seem as if Obama is un-American, a socialist, nazi and the left isn't doing anything, that's a problem. Obama is a product; the democrat party is the seller. We, the people, are buyers. The democrat party are not doing nearly enough to sell their product and keep their product viable. All the while, the right defaces their product with harsh words, the equivalent of arson. And yet the left still attempts to sell their product - spray paint, dents, rust and all.
Media attention and emotions, that's what sells. It's not so much the left needs a "messiah" but more that they need someone to show that the right are wrong -- not just logically but ethically, morally and as humanly as possible. Why? Because we have established that politics are about emotions, and if Obama wants to do real "change" and get re-elected, the democrat party needs to appeal to that sector. I thought they learned that with the 2008 election, but alas, c'est la vie. Anything other than this will be seen as a sign of weakness, unfortunately.
It's not about having a hero. Not at all. It's about damage control.
But overall, I agree with your point. I'm just clarifying myself.