For me, the "Satan-God" concept falls apart when Christians argue that God is all powerful, yet He's waging this war with Satan. If He's all powerful, why can't He win this war? If He's all powerful, how can He possible have an equal in the Cosmos? If NOTHING anywhere exists without God's permission, then how can He permit this Evil?
God's not waging a war. Satan is. And the entire reason he's still potent is because humanity opened itself up to him.
