Is the sentence grammatically correct? No error there?

[NewHopeR]

If God was omnipotent, why hasn't He turned Satan into a good man and saved all troubles that Satan makes?

 

[emsr2d2]

If God was omnipotent, why hasn't He turned Satan into a good man and saved all troubles that Satan makes?

If God is omnipotent, why hasn't He turned Satan into a good man (entity?) and avoided (I think there is a better word here but I can't think of it at the moment!) all the problems/troubles which Satan causes?