According to the JPost:
Mashaal, who is based in Qatar, has been blamed by Israeli officials in recent days for sabotaging a long-term truce along the Gaza front by repeatedly making new demands that Jerusalem is unwilling to meet.
Egypt has adamantly refused to permit Qatar to participate in the cease-fire talks, according to the report. Cairo wants a Qatari apology for the government’s policies toward Egypt since the military coup against the Muslim Brotherhood brought Abdel Fattah al-Sisi to power.
If the Al-Hayat report is true then the break down of talks falls directly at the feet of John Kerry. It was the United States Secretary of State who initially brought Qatar into the talks over the objections of Israel, Egypt and the Palestinian Authority. Now that those parties have frozen out the terrorist-funding Qatar, the Qatari government want to make sure they don’t succeed.