Not only for fearmongering. From the pen of a "conspiracy theorist" George F. Kennan, former US ambassador to Moscow and distinguished Council on Foreign Relations member:
"Were the Soviet Union to sink tomorrow under the waters of the ocean, the American military-industrial establishment would have to go on, substantially unchanged, until some other adversary could be invented. Anything else would be an unacceptable shock to the American economy."
Some will say the most American Jews are liberals and therefore wouldn't support neoconservatism. It's true that they are mostly liberals on domestic policy, but by judging candidates on a single issue (Israel) they end up implicitly helping neoconservative thinking, which places the most emphasis in the US-Israel relation.