Take the situation which occurred straight after Hamas’s election in 2006. After it, Israel ended its occupation of Gaza and removed all of its settlers, what did Hamas do? It immediately began firing rockets at the civilian centres of southern Israel. Not only that, its ‘brothers’, in the form of the Palestinian Authority, were also thrown out of Gaza. (More and more Muslim ‘brothers’ will die and be imprisoned the longer Hamas has power.)
The problem is that even if Israel permanently stays out of the West Bank, Gaza and wherever, this would be disastrous for Hamas. It would have the result that their fellow Palestinians would start to forget about the obligatory Holy War against the Jews and their sacred duty to destroy the whole of Israel. Not only that, media-savvy Hamas knows it would help lose the attention of all those pro-Palestinian Westerners if there weren’t enough Palestinian mothers crying for the camera. Thus it would be Fatah-time again.
And just as suicide bombings aren’t the result of occupation and increased Israeli violence, so Hamas’s increasing of assassinations of soldiers and civilians doesn’t correspond with increased mass demonstrations and revolt. For example, 1992 saw a real decline in the Intifada, yet it also saw an increase in Hamas’s assassinations of civilians and soldiers. Indeed it has been said that these increases in assassinations and suicide bombings occur precisely to egg on, as it were, the Israeli army's defensive and incursive actions, which would hopefully in turn regenerate the Intifada and reignite Western outrage against the Israelis. This reverse process has happened many times since Hamas’s inception in 1987.