Israel has more than enough justification for a hard line policy without selling out it's own citizens and ruining their lives. Justification enough, on the basis of things like protecting it's right to exist as a nation, protecting it's citizens against murders, etc.
I guess I don't understand a government that knowingly adopts a policy that it understands will lead to more violence against it's citizens. The primary job of a legitimate government is to protect the lives of those who claim the title of citizen. As long as they obey the laws of the country and support it's government, they have the right to expect that, at minimum. Adopting a policy where you know you will be sacrificing the lives of innocent civilians in the hopes of attaining a "greater good" is questionable at best.
The evacuation of the West Bank is temporary.
Hope springs eternal. There were those who thought Hitler's takeover of Austria and Czechoslovakia was temporary, too. Once old Adolf had gotten his fill of Czech pastries and Austrian beer, he'd be satisfied, and maybe go back home to Berlin to digest it all. Unfortunately, it only increased his appetite for conquest, basically a resurrection of the old geopolitical concept of Lebensraum. One can see a similar dynamic at work in this case. One would think the Jews, of all people, would be sensitive to it.