Israel should not become involved in any way. The problem is that if Hamas takes over Gaza, the 2 state solution is dead. There would be effectively 3 states, Israel, Gaza (Hamas) and the Fatah West Bank (where Hamas is less powerful).

Israel and the world generally believe that Fatah is a more pragmatic group and the only group to talk to (somewhere down the line) regarding the 2 state solution. If Hamas takes control of Gaza and Fatah flees, I dont see how their grip would be weakened in the near future. In fact, it has been reported today that Fatah is asking the Israeli authorities to help its people leave Gaza via the sea - a depressingly ironic situation.

Also reported is the execution of fatah prisoners by Hamas in front of their families. A Hamas dominated Gaza would quickly become a Taliban style Islamic area. "There will be no dialogue with Fatah, only the sword and the rifle," Nezar Rayyan, a top Hamas leader, told Hamas radio on Thursday.

"This is a battle between Muslims and non-believers, and God willing, we will lead the Friday prayer in the president's office, and transform the [Fatah-controlled] security complex into a big mosque."

I dont see how Jordan would be able to make any meaningful intervention regarding Gaza - the arms and fighters come and go via the border with Egypt.