Read the Koran for yourself so you will know why they feel it is their duty to Allah to subjugate, convert or kill you.
My thoughts on another post:
None of the dead Muslims who died and went to Hell was the fault of the shooter.
That was their own choice to reject Jesus.
None who died and went to Hell would have changed their mind given extended time in the future; God knows the future.
Those who have survived still have the chance to accept Jesus. God has extended their time for this purpose. We will all have to wait and see how that works out.
That said, the act of this insane shooter is not to be emulated, to help God or for any other reason.
This is my Bottom-line Worldview.