Israeli settlements are the logical "natural expansion" of the concept of the state of Israel, but that doesn't make them right nor should they be tolerated. While the state of Israel can't just vanish and go away, the Palestinians need to be given the right to their own land, what's left of it, without Israeli interference.
Yes the "natural expansion" of settlements is justified. The settlements should expand for the sake of the people. The expansion will bring more freedom to the people and allow the citizens to feel more independent. It will benefit the country and its people. The country is in a time of need where it needs to become sucessful on it's own and now is the time.