So you do not believe God is omnipotent.
While God doesn't have to be the determiner of our afterlife, God certainly can know what is determined for our afterlife. If he can't, he is neither omnipotent or omniscient.
Precisely. He is neither Omnipotent nor Omniscient. He is not Omnipotent because he cannot, even if he wanted, interfere with our free will.
So he could never prevent a murder, for example. Or whatever thing, whether it is good or evil. I dare say that we are as powerful as God, given that our free will is the main limit to his power. The Freedom to decide.
He is not Omniscient because he cannot predict what our future actions will be. He can read in your mind, of course. But given that we have free will, we can change our mind at the last minute.
So if I decide that tomorrow I will do something, the next day I can change my mind at the very last minute.
So God can predict nothing, when it deals with our free will