The claim is spot on with regard to Krugman and a number of others, but I think a number of those who would call themselves progressives do not fall in behind Krugman on this.
More along these lines from Ace, analyzing Krugman and Parker:
We have never really been arguing about whether we should go to war, or whether we should hate. The only contention of these past 10 years has been whom we should go to war with, and whom we ought to hate.This is exactly right. I have said for years that one of the chief difference between the left and right is that the right is concerned with external enemies and the left with internal enemies.
The bien pensants are quite insistent that we must not hate some External Other who serves as a bogeyman exciting our darker passions.
Rather, they urge, we must direct these darker passions at an Internal Other, the vast majority of Americans who do not consider themselves a type of latter-day digital order of Jesuits.
Apparently we all have the right basic emotional take on things; some of us have just chosen the wrong bogeymen to fear and hate.
Althouse also addresses the topic, criticizing Krugman for not allowing comments.
Mark Steyn's Let's Roll Over discusses things missing from the 9/11 commemorations.