Hamas says let us govern or watch us fight
The key issue for Hamas is to obtain recognition of its right to govern pursuant to the mandate obtained in the January legislative elections and acquire the resources to meet this challenge. If this goal is thwarted: Hamas will fight.
Hamas's 9 June renunciation of the unilateral ceasefire (or “quiet”, tahdi’a) proclaimed in March 2005, and actions since then, were designed as a message, not only to Israel, but equally to its Palestinian rivals and foreign adversaries.
The point is that if Hamas is either removed from power or prevented from governing, it retains other options and will not shy away from exercising them. These are priorities on which the entire Hamas leadership, irrespective of any internal differences and rivalries, remains united.