Was alot more than just a pre-emptive "strike". It was a massive
blitzkrieg (that had been planned by the Israelis for years - they admitted it) which destroyed Egypt's entire air force while it was
still on the ground. As a comparison, the surprise attack on Pearl Harbor left 188 planes destroyed, while Israel's blitzkrieg on Egypt left over 300 aircraft destroyed, leaving a total of approx. 375 Arab aircraft destroyed in one day alone (June 5th -- they assaulted Syria's Air Force as well). This so-called 'war' was over before it even started.
Also, get this: Israel assaulted Egypt while the US was actively engaged in dialogue with Egypt, and trying to work out a diplomatic solution to the issues and concerns at the time. But Israel totally ignored the diplomatic process - Why? Because Operation "Moked" had been planned and in the works for a long time, and they weren't about to lose the opportunity to destroy the Arab enemy and take as much land as possible. This is the truth that Israel has successfully been keeping away from American ears; instead they've been selling a bullshit myth about how they were "Attacked from all sides" and they're just "defending themselves" against the ruthless Arabs who want to 'throw all the Jews in the sea'.
On Edit: I want to add that the recent history of the region (by recent I mean the past 100 years) is jam-packed full of on the one side, Israeli myths and outright lies, and on the other side, the truth of Zionist aggression and ethnic cleansing. The myths and lies generally amount to a perception of Israel simply wanting a little bit of land to make a homeland and why won't these damn Jew-hating Arabs give it to them. The reality they don't want you to know is that the Zionists have employed every tactic necessary in order to take away as much land as possible from the native Arab population, and their tactics seemingly have not had any boundaries whatsoever. In the time of Hitler, the Zionists even fought
against British and American proposals to boost Jewish immigration (to get Jews out of Germany) because they wanted all Jews to go to Palestine instead.
My only point here is to say, be careful of the deceptions and myths, but if you are willing to put a little time into your research, the facts are all there to be discovered.
Check out this study sometime, if you have a chance:
ISRAEL'S SACRED TERRORISM by Livia Rokach - it is a study of the diary of Moshe Sharett, Israel's 2nd Prime Minister, written by the daughter of the Sharett's Minister of Interior. The study is shocking and revealing, yet Israel's gov't has done everything they can to suppress Rokach's work.