It was a joint task force, and how Israel responded was perfectly logical. It is a well known fact that the six days war was a preemptive strike, and pretending otherwise borders complete ignorance.
You're surrounded on all sides by several nations who want you exterminated for a variety of reasons, and suddenly, they ramp up the threats. Soon after, their armies start massing up on your shared borders, what do you do? Wait for their armies to carry out a coordinated strike, or attack them while their armies are unprepared?
You should read back a few pages instead of lashing out at people for ignorance and accepting blindly one side of the story. Emerging evidence has shifted the balance of blame towards the Israelis as well.
''Moshe Dayan, the celebrated commander who, as Defense Minister in 1967, gave the order to conquer the Golan...[said] many of the firefights with the Syrians were deliberately provoked by Israel, and the kibbutz residents who pressed the Government to take the Golan Heights did so less for security than for the farmland...[Dayan stated] 'They didn't even try to hide their greed for the land...We would send a tractor to plow some area where it wasn't possible to do anything, in the demilitarized area, and knew in advance that the Syrians would start to shoot. If they didn't shoot, we would tell the tractor to advance further, until in the end the Syrians would get annoyed and shoot.
And then we would use artillery and later the air force also, and that's how it was...The Syrians, on the fourth day of the war, were not a threat to us.'''
The New York Times, May 11, 1997
I wouldn't simply say the Six Day War was caused by the Arabs, it was caused by a decade long resentment and building hostility that culminated in the troop buildup and pre-emptive strike. To shift the blame entirely to the Arabs stenches of biasness and callowness.
One cause of this tension was Israel's policy of diverting water from the Jordan River down to the Negev Desert. This angered Arabs, who threatened to stem the flow of water into Lake Galilee. Syria had begun earthworks to divert water away from Israel but these were bombed by Israel in 1965 and 1966.
Terrorist activity against Israel also increased during the 1960s, especially following the formation of the PLO and Al Fatah. This heightened the already extreme tension between Israel and its neighbours. Most of this activity came from the Golan Heights and bases in the West Bank. Israel was determined to wipe these terrorists out and saw all-out war as an effective solution.
In 1966 the Ba'ath party gained control of Syria. Ba'ath was a very militant anti-Israel group. Due to accusations of hiding behind the UN, President Nasser of Egypt also took a more militant stance towards Israel.
Many historians consider that the economic problems the Israelis were having at the time were a major reason for wanting a war with the Arabs. A war would distract people's minds from unemployment and low growth and would also bring in foreign money to boost the economy.
As well as this, many Jews believed that the former Israeli government should have been harder on the Arabs in the previous conflict, the 1956 Suez War. David Ben-Gurion, a former Prime Minister believed that another war would secure Israel's borders against further Arab aggression.