This is something of a misnomer since while some of the settlements are recklessly deep into the West Bank - Ariel (above), for instance - others are indistinguishable parts of
Jerusalem. They are all, under international law, illegal. But some, regardless of legality, are going to stay. Even in the Middle East, common sense can play a role. The Jerusalem-area settlements are not going to be abandoned by Israel.
The settlements issue is complicated but not unsolvable.