Lets try the moral argument. The Quran quotes God as saying. " I created men and Jinn only that they might worship me." What kind of pathetic God would create beings just to worship him? and what kind of human beings worship a God that will burn unbelievers in eternal hell?
Here are some of the verses in the Quran about what God will do to people and it makes him out to be an insane sadistic monster. No human father or mother would do these things to their children, so why would God?
4.56 Those who reject our Signs, We shall soon cast into the Fire: as often as
their skins are roasted through, We shall change them for fresh skins, that they may
taste the penalty: for God is Exalted in Power, Wise.
22.19 These two antagonists dispute with each other about their Lord: But those
who deny (their Lord),- for them will be cut out a garment of Fire: over their heads
will be poured out boiling water.
22.20 With it will be scalded what is within their bodies, as well as (their) skins.
22.21 In addition there will be maces of iron (to punish) them.
22.22 Every time they wish to get away therefrom, from anguish, they will be
forced back therein, and (it will be said), "Taste ye the Penalty of Burning!"
40.70 Those who deny the scripture and that wherewith we send our messengers.
But they will come to know.
40.71 When yokes are about their necks and chains, they are dragged.
40.72 Through boiling waters; then they are thrust into the fire.