The first one is very strange, since it contradicts basically all data I've seen anywhere. The other two make sense, since Americans generally prefer not to intervene and to cut foreign aid, so those opinions aren't really out of the ordinary. What might be the case here is that to 'take the side of' is stronger wording than 'sympathize'; ultimately, Americans don't really know all that much about the Israeli-Palestinian conflict and what the forces Israel is facing are like. (Which is basically the case for any foreign policy issue, unfortunately). But, broadly speaking, casual American support for Israel remains not just very strong, but stronger than it has ever been and strengthening.
As for Jewish opinions on the conflict, well, the large levels of support for Israel among the general population and the statements of prominent Jewish-community figures (and my personal experiences, though those are probably a tad skewed) suggest that Jews probably support Israel overwhelmingly, but of course there is great diversity of opinion in the Jewish community, as there has always been, and not everyone holds this opinion. (The same, btw, is the case in Israel itself).
As for opinions on AIPAC and Netanyahu, those who are politically plugged-in and have heard of them probably break down the same way as the pro/anti Israel numbers; largely a positive opinion, in both cases, though with some negative dissent. The last survey I could find on opinion of Netanyahu in the US is 3 years old, but it shows significantly more Americans have a positive opinion of Netanyahu than not (
http://www.gallup.com/poll/156338/Americans-Positive-Negative-Toward-Netanyahu.aspx?utm_source=netanyahu&utm_medium=search&utm_campaign=tiles ), though he is largely unknown. Considering it is close even among Democrats, I think most American Jews approve of Netanyahu. (Obviously, in the context of Israeli politics, most American Jews would be supporters of the Labor Party and Yesh Atid if they lived in Israel, but I think few American Jews are really aware of the intricacies of Israeli politics and tend to just automatically think Prime Minister of Israel=FF. Which on the international stage is true).
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