> That's certainly not true in many European countries

This suprised me. I’ve hunted for polling and can find plenty showing a plummeting opinion on Israel, but little on internal polling about a Palestinian state.

Polls are interesting. They depend exclusively on people willing to respond. Let me give you an example of how they don't tell the whole story:

In the USA, there are many, many firearms. And there's also a small but very vocal cadre of people who would like to disarm the people. In light of this, if a pollster calls and asks for your opinion on guns, and/or inquires if you have any, a common response is to hang up without answering the questions, due to the possibility that the information will be used against them.

The result? They call someone else, and don't count "declined to answer" in their results. So the poll simply is the prevailing opinion of those who wished to answer, and thus is skewed one direction. (BTW, this is why everyone says there are "at least XXX hundred million guns in America; the best they can get is a low estimate)

This happens quite a lot with controversial topics.