If the Judeo-Christian Islamic God is omniscient, then there can be no free will.  If he knows exactly how the future will play out, free will cannot exist.  If God knows the next sentence you will utter, then everything is predestined.  If this is the case, then how can we be mad with anyone when they do something that disappoints us?  It was God’s will that the incident occurred.  Free will and godly omniscience are incompatible.