If Hamas does decide to fight a third one it will be very poor politics internationally speaking, though probably smart domestically. At the moment a great deal of hope is being bet on the idea that Hamas is ready for a deal. If Hamas dashes that with renewed terrorist attacks it will suddenly become very difficult for Western nations to criticize Israeli actions.

Hamas should not start a third Intifada but it would be absolutely foolish to give Abbas any legitimacy by reaching a unity deal. Abbas is on his way done for overdoing his collaboration and cheating the Palestinians - he doesn't understand that the Palestinians will not accept this treachery ALL the time! If Hamas supports him now, it will lose its legitimacy and will be on its way to becoming 'FATAH version 2', a new strain of in-house collaborationists and puppets of the illegal occupiers.

This article repeats the debunked fiction that Ariel Shoron's visit to the Temple Mount started the second intifada.
The week prior to Sharon's visit two Israeli policemen were murdered by PA policemen who they were with on a joint patrol, and there was a bus bombing in Azza .
A peak was reached after the Al Dura Hoax was broadcast. The Al Dura footage was part of a program of guerilla skits videoed in Azza. Each youth in turn would act out being hit by Israeli army bullets. The footage of Mohamid Al Dura being "killed" was sliced out by France's Channel Two reporter Edilin and broadcast to the world. Later the French media ohmbudsman would agree that the scene did not show anyone being killed. And Philip Karsanty would win a court case to label the scene a hoax.
Several PA politicians had said that the Intifada was planned by Arafat after he did not get what he wanted from PM Barak.

A curse on both their houses.