It seems that the man who attacked bloggers so viciously is a sockpuppet.
An Apology to Our Readers
After an investigation, The New Republic has determined that the comments in our Talkback section defending Lee Siegel's articles and blog under the username "sprezzatura" were produced with Siegel's participation. We deeply regret misleading our readers. Lee Siegel's blog will no longer be published by TNR, and he has been suspended from writing for the magazine...
Updated: Ezra Klein was the one who tells us about "the "Sprezzatura."
But at least he gave us "blogofascism."
Atrios has much more