Who sent you all to fight for Islam?

Somebody made a video that has offended many Muslims who have now taken to the streets, rioting, in several countries.  I haven't seen the video.  Perhaps I should. 

I know and love many Muslims and even Islamic culture.  But something is wrong here: stop bloody fighting for God.  Let God fight for itself.  Or Himself.  Seriously.

Amid cultural clash, Louvre honours Islamic art

 If there are serious opinions as to why it's necessary to violently defend Allah or The Prophet from the ignorant or unbelieving, kindly share them.  Otherwise, this life we've been given, let us spend it in study, in peace, in friendship, kindness, and constructive pursuits.