Ethnic Cleansing has bad connotations, but it does not have to be cruel. The fact is, unless the Palestinians stop the terrorists in their midst, they have no right to expect the Israelis to treat them as friends. Unless that happens quickly, the best thing that could happen would be for the 2 parties to live apart.
BTW, what do you think would happen to the Jews who did not choose to be "ethnically cleansed" from the future Palestinian state?
I agree that forced population transfers are not always wrong. But a forced population transfer of Palestinians
1) Will not happen. Israel needs the support of the West, and the West would never stand for it.
2) Is contrary to US interests. As much as the neocons hate to admit it, we need at least cordial relations with the various Arab states, and it would be helpful to have friendly relations with a few, as we currently do with Jordan. Ethnic cleansing of Palestinians would instantly destroy all such relationships, and would cause all the moderate Arab regimes, such as Jordan's, to fall.
BTW, what do you think would happen to the Jews who did not choose to be "ethnically cleansed" from the future Palestinian state?
Palestinians would not tolerate a largescale presense of Jews in their state. However, given that the vast majority of Jews living in the occupied territories are settlers who moved there within the last 10 years, having them move out would not be so bad. It's not like they have any longheld ties to the land.
Israel probably could secure the saftey of a few small long-established Jewish communities, such as in Hebron, living in the Palestinian state, so long as their numbers are small. In return, Israel would have to allow a small number of Palestinian refugees, those who actually were driven from their homes by the IDF and had property confiscated, to return on Israel.