My speculation (repeat speculation) is that if Mohammed Dahlan became the “President”, he would be prepared to use force as necessary to impose Israel’s terms for peace on the Palestinians.
Dahlan demonstrated his enthusiasm for doing Israeli and American dirty work when, at the request of the Bush administration, he agreed to lead a military campaign to destroy Hamas after its election victory in 2006. The Bush administration provided Dahlan with money and arms and trained his Fatah fighters in a number of Arab countries.
But it all went badly wrong for Dahlan and his sponsors. Hamas got wind of what Dahlan (fronting for the Bush administration and Israel) was intending and launched an Israeli-like pre-emptive strike. It destroyed Fatah’s security forces based in the Gaza Strip (which had been Dahlan’s base) and put Fatah politically out of business there.
Commenting on what had happened in the Gaza Strip, Hani al-Hassan, for many years Arafat’s crisis manager and one of his two most trusted advisers, said it was “not a war between Fatah and Hamas but between Hamas and Fatah collaborators who served the Americans and the Israelis.”