If they stopped building settlements; stopped dissecting the West Bank for the settler's safety and actually acted like they were interested in a two state solution, that'd be pretty good.
Few sane people are criticising Israel's right and necessity to defend its citizens (although the way they're going about it is certainly fair game) - where it appears most critics (including myself) have a problem is in that subset of Israelis who oppose peace and (especially through the settlements) do everything possible to obstruct it - and have been controlling the government in recent years. Hamas's behaviour is indefensible. But unprovoked it is not, and for the Israeli government to play the innocent in this is just taking the piss.
TL;DR As history proves, violence without a political dimension only begets more violence.