For all their current prestige Osama bin Laden and the suicide bombers are still regarded in all but the most desperate districts of Gaza or Peshawar as romantics with little chance of more than symbolic victories however bloody and brutal. That gives both the Middle East and the West a small and distant hope of security.
If you cannot work on the marriage or the women is a moron staying married and cheating makes the most sense because divorce is disruptive to the family life and your bank account.