It's the old cliché: "but is it good for the Jews?" Jews in the diaspora are used to seeing their situation - as Jews - change when regimes change. Katarina "the Great" was bad for Jews. Maria Theresa was much better.
Since nobody's expecting either Kerry or Bush to institute pogroms or a Pale of Settlement in the next four years, a lot of Jews are instead asking the question "which administration would be better for Israel?"
The reflexive response is "Bush." As the US president of recent memory who has been the most principled in opposing terrorism and least concerned about appearing "even-handed," he has largely left Sharon alone to deal (quite effectively) with terrorism directed at Israel. And it actually helps Bush gain the Jewish vote when so many left-wing anti-Zionists argue that Bush perpetuates terrorism by supporting Israel.
But for the traditionally liberal Jewish community, it's difficult to vote for Bush on this single issue when so much of Bush's other policies - ranging from the war in Iraq to the environment to economic policy, etc., run counter to their convictions. Jews, the saying goes, "live like Episcopalians and vote like Puerto Ricans."
So, what to do?