Wow, you must be joking me. First of all, 500 is hardly a representative sample of all Israeli Jews (there are more than 5mln). They might just walked up to a yeshiva. And the way questions are worded affect answers a lot. Furthermore, even if the sample represents Israeli Jews, the results are very good. 57.6% think that 'organizations that expose immoral conduct by Israel' should be gagged. What about the rest, 43.4%? I bet that in US you would not get such a good result. 82% 'back penalties for people who leak illegally obtained information exposing immoral conduct'. Do you see the way the question must have been worded? 'illegally obtained information exposing immoral conduct'. Any rational person would say that they would hesitate to expose illegally obtained information endangering their country, keeping in mind that all their neighbours are potential danger who would use such information to harm them. I could analyse the rest of results too, but I think you get my point.
Passport control employees at Ben Gurion airport to strike between 11 A.M. and 1 P.M. (Haaretz)
from the article: Poll: Majority of Israel's Jews back gag on rights groups