I don't normally participate in these threads, primarily because neither side typically wants to discuss anything and is much more content bickering and mud slinging. But, after following this one through its entirety, I've decided to add my two cents (even though it is probably a mistake).
First of all, Zionism has nothing to do with most of what has been posted in this thread. Simply put, Zionism is the drive to establish a Jewish state where Jews can govern themselves and live without being persecuted for being Jewish. Since a Jewish state has been established, it has been expanded to also mean the survival of that state. It doesn't mean there's a Divine mandate for Jews to push the Palestinians into the sea or that Jews are somehow more "special" than any other group. History, both ancient and modern, has shown time and time again that Jews, no matter how hard the assimilate into their adopted countries or how hard they work to support them, are constantly at risk of being singled out for persecution, exile, murder, and all manner or other atrocities.
That being said, I fully support the Jewish state. I also fully support a Palestinian state, and deeply regret that the UN's plan did not go forward. No one should be forced off land to make room for another groups, and no one should loose land for any reason without just compensation (eminent domain). But this a problem that isn't contained within Israel, nor is it completely Israel's doing. The Palestinian people have long been at the mercy of politicians (both theirs and other nations'), and have been treated as pawns in regional struggles since before WWII. Hell, the British (who controlled the area) promised it to damn near everyone in the area.
I fully support the state of Israel, but not all of its policies.