There can be no other scenario Renniks, except that all that ever happens and come to pass, are what God had in His plan, had preordained to happen, allowed and sustained as to happen according to the laws and decrees that He had set out to govern all of that He will create. For there is none that is outside of God before creation. There could be none that could exist and happen if not what is within what was created by Him and ordained by Him to happen or allowed to happen. There is no random event that happens outside of what God had made. And as it is God who sustains and holds all creation together as to exist as they exist from the time they were created, existing within the ordained and designed processes of change they are ordained and allowed to go through time during their existence, all living and moving in accordance to and within their given boundaries and freedom, without contradiction and conflict with one another, God must inevitably be in control of them all, else we could not even imagine what will be the result of that and how that will be.
You said "Even I can know what I'm going to do once I plan to do it." Do you? You only think you do or had convinced yourself that you do. For only God can, for only God is omniscient and the absolute yes and no and is immutable.
You said "If God already ordained all that was to happen, seeing the future doesn't require omniscience." Seeing the future does not require omniscience because seeing the future is an aspect of God's omniscience as seeing the past is an aspect of His omniscience as well.
You said "If God decrees everything, that makes him the author of evil, which would not make him the God of scripture." I have to admit, this is truly a very very difficult subject for us humans in that this is not even about the already very difficult and complicated subject of origins or beginnings, but is about the subject of that which is without origin or beginning nor end ~ God, the infinite, the perfect, the eternal, the spiritual, the sovereign, the holy, the good, the infallible, the omniscient, the omnipotent, the omnipresent, the immutable, the creator, etc. As a comment on that very delicate and complex subject, here's one that God had decreed involving man, Israel in particular, and what Paul have to say about that:
Romans 11:32 For God has committed them all to disobedience, that He might have mercy on all. 33 Oh, the depth of the riches both of the wisdom and knowledge of God! How unsearchable are His judgments and His ways past finding out!
Is that evil? So, even before we can really start talking about your statement there, this simple question must first be answered. Also, is that included in the "evil" in your statement?
Tong
R0100