Doug Hanson at The American Thinker makes the interesting point that Israel's ability to move freely in Gaza during its current operation there is possible only because there are no longer dozens of Israeli settlements impeding their military maneuvers and lines of fire.
In other words, Ariel Sharon's decision to withdraw from Gaza, though very unpopular at the time, seems to have been militarily prescient. The Israeli Defense Forces have much more freedom of movement in Gaza today than they would have had two years ago and far fewer Israeli lives are at risk from Hamas than would be were the Israeli settlements still in place.