The same follows for "the Arabs," "the Palestinians," "the Blacks," etc. I seem to recall Carrol making this point w/respect to Dave McReynolds and Palestinians, though if you know Dave M. you know it was more a mistake than an expression of malice.
To be honest, I have to say I can't be sure I haven't employed the same usage w/respect to other groups. But if I did, I'm pretty sure I wasn't dumb enough to make a column out of it!
Cockburn has really slipped down a rung, and he wasn't that high to begin with.
mbs