Personally, I'm not there, and I'm not going to jump to definite conclusions about it, but I'm sure Israel are just as sure that Palestine 'started it' as Palestine are sure that Israel 'started it', when, if the real truth be known, neither of them started it.
The saddest fact is that it seems both sides are convincing themselves that the only way to finish it is with blood and fire, and after all that killing, rockets are still hitting Israel, and the Israeli navy is still shelling the beaches.
I'm against radicalism as much as the next guy, but to quote an Israeli citizen who was interviewed during the advance, 'I fear Israel is just teaching another generation of Palestinians to hate and fear us', and so the cycle will continue.
As long as hatred is bred into both sides of the conflict, there is risk, of a radical getting their hands of a nuclear device, or Israel doing the unthinkable and using its own nuclear Arsenal, the only way to reduce that threat is make peace and start a dialogue. Hamas may refuse to talk to Israel (and Israel may not want to talk to Hamas), but recent events have vastly reduced the odds of any political group in the area being able to talk to Israel without being rejected by their own people.