Is criticism of Israel de facto anti-semitism?

So asks Alexander Cockburn in his latest column (by way of Dr. Mabuse):

There are plenty of sound arguments that from the Palestinian point of view Israel is indeed a terrorist state, and anyway, even if it wasn’t, the description would not per se be evidence of anti-Semitism.[…] The rhetorical trick is to conflate “Israel” or “the State of Israel” with “Jews,” and argue that they are synonymous. Ergo, to criticize Israel is to be anti-Semitic.