I think this is true. We often forget about the nutty "Christian Zionists" & Southern Loonies like Pat Robertson or Gary Bauer. Robertson, IRC, supported Gulliani because he was 'good on Israel' in 2008 - so what if he was pro-choice! Gary Bauer, meanwhile, refused to support the Huckster, his fellow Christian Evangelist, because McCain was "better for Israel". An then there's Rev. Haggee.
However, I think Walter is wrong about Palin & many other Pols. You need to remember politicians gain nothing by anti-Israel and gain at least something by being Pro-Israel, no matter where they are. Being "for Israel" is like being for "Diversity" or "God, Home, and Apple Pie". Its a no-brainer for a politician, no matter what they really think on the issue.
I think its often forgotten that probably 75% of Americans who aren't Christian Zionists, Gentile Loonies like Gary Bauer, Jews, or Arabs, don't really care about Israel. They want Israel to be safe & prosperous, like they want Ireland or New Zealand to be safe & prosperous, but otherwise they don't really give a damn. So its quite easy for AIPAC to dominate the discussion because there's no one on the other side, and no one else cares.