jbennet, That's a good question. There have been studies linking testosterone levels to violence, making violent behavior more of a guy thing. But more likely it is because women from these terrorist countries are not permitted to behave in an aggressive, or assertive manner - or a manner that would predispose one to terrorism. There are female suicide bombers in Israel tho. Hamas must be a big champion of women's rights...
PS jb, If women were permitted any self expression in these countries, the males who 'own' them would probably become victims.