They still started the war. I'm not arguing that it wasn't justified, or that I wouldn't have advocated for it, but that doesn't change the fact that Israel attacked first. Which was, incidentally, damned fine work -- they prosecuted that war damned near perfectly. However, you're missing the point I was driving at. Not only did Israel manage to pull that off, they did it in six days with absurdly imbalanced losses. They're also an unofficial nuclear power. Things are well past the point where Israel's survival as a state is in question. That's all more or less irrelevant to the real issue.
I don't really have anything against Zionism in principle (though it's laughable to call what happened after the last, successful revolt against British rule anything but ethnic cleansing). But AIPAC is arguably the strongest lobby in the U.S., which is a pretty damned strong statement, considering how much weight a number of interest groups have. And that's what it comes down to; I don't particularly like home-grown interest groups and lobbyists having that much power, but when they're explicitly working for the interests of a foreign power? Hah, no. Can you imagine the fucking uproar if there was a successful, public lobby for supporting, say, Russian interests? (There wouldn't be one, because a lobby which enjoys that degree of success can suppress a hell of a lot.)