Ground invasion of Gaza

Now Israelis have invaded Gaza again. Do they ever learn? I don't speak of the pure brutality and disgusting affair of invading the most densely populated area on earth with pure military force and killing defenceless people. No, what I mean here is they have been there and done that. They occupied that land for decades, and yet were kicked out at last. What can they do now that they did not do last time? Short of complete holocaust and wiping out the whole Palestinian population there, they can't subjugate them. They will again be bugged down in a senseless war, killing hundreds of innocent people, bringing more hatred upon themselves and at last have to leave Gaza again without achieving a thing.