cupid you say God doesn't cause wars. I suggest you read the OT, didn't God tell the Jews to invade Judea and that he would help them . Aren't the Israelies occupying land that had belonged to the Arabs for the past 1000 odd years all because God gave it to them.
God gave the land of Canan to Abraham and his descendants see :
Genesis 12.7, 13.15, 15.18, 17.7 . This has resulted in hundreds of wars over a period of 3500 years.
God gave us our will for good or evil . Murderers and saints are both made by God. So God is responsible for everything on earth . It's no good you hiding behind the myth of Satan or we have free will. Whatever will we have was given to us by God.