"Tracking efforts to stifle open debate about US-Israeli foreign policy." That's MuzzleWatch's tag line.
Maybe they are actually tracking such efforts. But what's certain is that they're not saying anything about attempts to stifle open debate when the ones being muzzled are moderate pro-Israel voices.
From UC Irvine, we have some more evidence that the Jewish Voice for Peace considers some muzzling to be condemnable, and some commendable, some types of speech to be good, and some bad.
This video shows what JVP and their MuzzleWatch blog seem to categorize as "commendable" muzzling of "bad" free speech: