Cockburn is only one of a number of well-known progressives who have strayed off the iron-clad party line on one issue, and have been pilloried for it. Like Lieberman. The American Left prides itself on "diversity" of inconsequentials like appearance, language, or sexual preference. When it comes to ideas, principles and policies, it's about as diverse as a flock of penguins.

I made the point that fearmongering in this country doesn't, by any stretch of the imagination, derive from only one political viewpoint. Aside from simply making a list of examples, I've now brought backup from someone a lot further left than you are. You can't field that effectively so you duck it. Maybe you need to read his book. You seem to like books on ideas.