JERUSALEM — With the two Palestinian territories increasingly isolated from each other by a week of brutal warfare between rival factions, Israel and the United States seem agreed on a policy to treat them as separate entities to support Fatah in the West Bank and squeeze Hamas in the Gaza Strip. The idea is to concentrate Western efforts and money on the occupied West Bank, which Palestinian President Mahmoud Abbas and his Fatah faction control, in an effort to make it the shining model of a new Palestine that will somehow bring Gaza, and the radical Islamic group Hamas, to terms. As Ehud Olmert, the Israeli prime minister, who arrives in the United States on Sunday to meet with American officials, said, a Fatah government, shorn of Hamas, ‘can be a new opening.’ After the failure of the Palestinian unity government, Mr. Olmert said in an interview with The New York Times, ‘I suggest we look at things in a much more realistic manner and with less self-deceit.’ But like all seemingly elegant solutions in this region, this one has many pitfalls. It is entirely unclear whether Hamas would sit still during such an effort, whether […]