There was an anti-Iraq war demonstration in Tel Aviv. From this report it sounds like here (as elsewhere) the protesters were a motley group of idiots.

Israeli support for the Iraq war derives foremost, I think, from the belief that preemptive attacks against mad Arab dictators are periodically necessary and usually justified.

Support for the war seems to be shared by a couple of the better writers in Haaretz who offer some muted criticism of the US: Zeev Schiff (not so convincingly) suggests that the Americans have not considered many important aspects of the war; and Yossi Melman, who writes well-informed pieces about intelligence issues, says that Saddam's connection to terrorist groups are less direct than the American portrayal.