I would only add to Ken's definition that the only reason the Christian Zionists support Israel and oppose peace between them and the Palestinians is not as some might believe because of a love for the Jews or the nation of Israel, but rather, to fullfill an eschatological interpretation of the end times, namely pre-millinialism.
I would consider myself to be a Zionist in that I support a homeland for the Jews in Israel, and in that I support Israel in the conflict more than I don't because of political and moral reasons. But not for religious reasons. Furthermore, I also support the encouragement of Democracy and Human rights reforms as a pre-cursor to a Palestinian state that can live peacefully side by side with Israel. I don't think that Israel has anything to prove in the peace plan. IMO, they have proven themselves ready to make peace time and again. Rather, the PA must be reformed and prove itself worthy of governing a peaceful state of their own. The only responsibility that I would place on the nation of Israel would be to encourage democracy among the Palestinians and not repeat the mistakes of Oslo.
Joseph Botwinick