I actually found the link to this column at:
http://www.realclearpolitics.com/
It was posted with a different title on the realclear website than the actual Observer link.
RealClear posted: Why I've Been Excommunicated From the Left - Nick Cohen, The Observer
I read this website every day.
RealClear is truly on of the best political link sites out there.
You would not find a link to this newly enlightened liberal in any of the MSM.
Yes, RCP is where I linked to this article, and read it. Although the title there was different than what you posted, I recognized the author's name - Nick Cohen.
I guess he is about to have a quiet life, since he will no longer be acceptable at leftwing gatherings, etc.