Many American Jews who are liberals, supporters of Israel, and generally well informed about events of the day suppress their knowledge of Israel-Palestine to a second-rate level of almost innocence. An inadequacy which (out of pride) they wouldn't allow themselves in approaching any other subject. They do it because they are afraid if they knew more, they would have to condemn much of Israel's conduct toward the Palestinians.
This mentality has a recent historical parallel, in the liberal fellow-travelers of the Soviet Union from the late 1930s through the 1950s. Such people contented themselves with half-knowledge. Their reason was that, if they knew what they might have taken the trouble to know, they would have found themselves thinking and saying things about the Soviet Union that they couldn't bear to think or say.