John Aravosis, that is:

President Obama doesn’t seem to lack the will to fight on matters of principle, rather, he seems to lack the will to fight on anything.……

…

…We know that when you fight for something in politics, you can very often win. But if you don’t fight, you’ll never win. We are upset at the President and the Congress because no one fought for the public option, for the President’s own campaign promise. (As David Gregory rightly noted to David Axelrod during the same broadcast.)

(emphasis mine)

We are not angry because he refused to fight for our own values, we are angry because he has refused to fight, period, full stop.

It’s not the morals, or lack thereof. It’s the cowardice.