Invincibility is in oneself, and vulnerability is in the opponent. Invincibility is a matter of defense, vulnerability is a matter of attack. Therefore skillful warriors are able to be invincible, but they cannot cause opponents to be vulnerable. That is why it is said that victory is discerned and not manufactured.
Now let's make two things clear: ISIL is not 'Islamic.' No religion condones the killing of innocents, and the vast majority of ISIL's victims have been Muslim. And ISIL is certainly not a state. It was formerly al Qaeda's affiliate in Iraq, and has taken advantage of sectarian strife and Syria's civil war to gain territory on both sides of the Iraq-Syrian border. It is recognized by no government, nor the people it subjugates. ISIL is a terrorist organization, pure and simple. And it has no vision other than the slaughter of all who stand in its way.
Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.
While once it was the rank and file that cheered with all the partisan passions at their heights, today it is the party leaders who are cheering themselves; and all by themselves. The mob that is their audience is in one vast universal trance, thinking about something else.
Where is he who seeing a thousand men useless and unhappy, and making the whole region forlorn by their inaction, and conscious himself of possessing the faculty they want, does not hear his call to go and be their king?