This is not an Austrian School war, but it does demonstrate how contradictory, deceiving and misleading are some of the things Krugman writes, even when viewed from by a Keynesian.
Here is Sumner with a sharp stab:
Don’t you love the way [Krugman] juxtaposes; “This isn’t hard folks” ”it’s just Macro 101″ ”stupid people” ”don’t want to understand” ”hard time grasping this basic concept.” Let’s translate this bit of Krugmanese as follows:
“I want to signal to my sophisticated readers that anyone who believes monetary stimulus can restore full employment at the zero bound is stupid, but I also want to be able to deny that I made that charge. So I inject the term ‘stupid’, next to all sorts of other comments that imply I think they are stupid. I’ll say my opponents are not stupid people, even as I imply they are.”
The full takedown by Sumner is here.