The Hypocrisy of their actions sum up their entire ethos, they are prepared to go and fight for an ideal and a group of people ( of a specific faith ) and die if need be. However, should they survive and Live; they don't want to Live under that very same wonderful ideal / regime that they purport to love and admire so much. No, they want to come back to their Western countries of birth; that allow them the freedoms, opportunities and tollerance to practice the opposite of what they preach.