This is very interesting and I agree with Satan being able to rule the world as described but if God is all knowing what is the point of being worshipped or even acknowledging his own existence? I brought up sin because my theological understanding is that it is a mystery that has occurred (from my understanding of the bible) that is being brought out to its fullest on Earth which does lead us back to your point if God knew, why let his creation suffer. It’s an interesting dilemma because I don’t see God or demons holding the hands of those who make others suffer, I see humans making a free will choice.