“If Israel agrees to Hamas demands, which include the return of displaced Palestinians to northern Gaza and increasing humanitarian aid, that would pave the way for a (truce) agreement within the next 24 to 48 hours,” said the official, speaking on condition of anonymity to discuss the sensitive issue, as negotiations were set to resume in Cairo.
The answer is right there. The Israelis drove them out and then required a deal to let people try to come home after the violence.