There's no doubt that the Palestinians have suffered much more than the Israelis from the conflict, the Israelis won and they lost (and not just because of israel - other arab countries have treated them atrociously, look at the apartheid in lebanon). It wasn't always obvious that Israel would win, in 1947/8 and in 1967 Israel was weak and things could have ended very differently.
Bambanbini makes a valid point by asking what would have happened if the Palestinians would have won? Hamas makes no secret that it wishes to destroy Israel. If the Arabs would have won in 1948, it wouldn't have ended in a refugee crises but in genocide, they also made no secret of what they intended to do.
There is an element of collective punishment in the Israeli response which I condemn, but there is certainly no wish or attempt to annihilate the Palestinians.
All Israelis I know, from across the political spectrum, condemn the murder of the Palestinian boy. The families of the murdered Israeli teens have fully condemned it. Benjamin Netanyahu condemned it - unlike Hamas, the elected representatives of many palestinians, who supported the killing of the Israeli teens.
By the way, there is plenty of evidence that Hamas were involved in the kidnap and murder. It probably wasn't ordered from the leadership who probably wish the unity government to work but if you encourage your members to be murderous bastards, you probably shouldn't be surprised if they're murderous bastards. If Hamas are destroyed, the world will be a better place, I not lose sleep over Hamas being 'punished' for something they claim they didn't do.