Benjamin,
I think (mho) that if we are all intellectually honest, there exists a tension between divine foreknowledge and determinism. Throughout history, this has been hashed over by great thinkers, philosophers and theologians, all making wonderful and cogent arguments for their perspective. I have a great disdain for pejoratively being called a "free willer", but where I am (and have been for 30 years) is that I am personally convinced that there is some degree of freedom built into creation (man) intentionally by the creator. Molinism, for me at present best resolves the tension of that antimony.
Seems to me, extremes on either end of the spectrum lead to fruitless logical and theological dead ends and conundrums.
Having God "decreeing" the movement of every atom (although most certainly possible) inevitably leads to God being the author, orgiinator et al. of sin. In my feeble mind, this Cannot be.
God can be the ultimate cause of evil and not be evil at all himself.
The issue is motive.
God's motive for ordaining that evil should exist is holy and noble and pure.
Motive is ALL that makes a thing morally right or morally wrong.
If I kill a man in his living room I am a murderer.
If I kill the same man on the battlefield I am a hero.
Same action same basic result- one is good and the other is evil.
Motive made the difference. Motive for one was malice. Motive for the other is defense of country.
We see this clearly with Joseph's brother. Joseph said, "You meant it for evil but God MEANT IT for good."
Same action, different motives.
Adam's motive for partaking of the forbidden fruit was evil.
God's motive for Adam partaking of it was good.
God meant the evil to come to pass and yet he is perfectly holy and righteous at the same time.
In fact, evil is NECESSARY for God to DISPLAY his grace and mercy and love to the fullest.
God COMMENDETH his love toward us in that while we were yet sinners Christ died for us.
God uses our sin to SHOW his great love.
That in the ages to come he might SHOW forth the exceeding riches of his Grace in his kindness to us in Christ Jesus. Ephesians 2.
God SHOWS his great grace and receives glory for it throughout eternity by sin.
God's motive is for evil existing is for his glory.
His glory is the highest and noblest of all motives for anyone- including Himself.