When "Zionism" is blamed for the ills of the global capitalist system, you know the writer is taking his cue from the Protocols—even if he is ostensibly coming from the "left." Pointing this out is not a defense of Zionism.
We have, of course, repeatedly pointed out that—however much Zionists may propagandistically abuse the charge—anti-Semitism (veiled, barely veiled, or plain old blatant) really is evidenced in much ostensibly "leftist" discourse these days.
There are doubtless many good reasons to oppose Henrique Capriles Radonski, the bourgeois politician who is challenging Hugo Chávez for Venezuela's presidency. His Jewish background is equally assuredly not among them.
It is really, really a drag to have to do this, but we really have no choice.