Does the left learn?
Transmontanus has a post about a similar issue, prompted by Zizek's recent LRB essay. He (Terry) responds to Hoare's fairwell to the left thus:
Fighting words, so fair play to him, but to be really fair you'd have to concede that there is a "Left" that is anti-capitalist but is still capable of facing the facts Hoare demands we face. For starters, you could read "Against the Anti-Globalization Critiques" or this treatise, "Regional War in the Mid-East Calls for Class Struggle and Solidarity with Israel." Even the "anti-war" movement has clear thinkers: here's an anti-war movement I can really get behind.
The Contentious Centrist has given us links to places she has commented lately, including the above-mentioned post. These are very worth reading.