1) It doesn't make sense to you....and who or what God is, does matter to me.
2)
1 Corinthians 2:9-11
9 However, as it is written:
What no eye has seen, what no ear has heard, and what no human mind has conceived [a] the things God has prepared for those who love him
10 these are the things God has revealed to us by his Spirit. The Spirit searches all things, even the deep things of God. 11 For who knows a persons thoughts except their own spirit within them? In the same way no one knows the thoughts of God except the Spirit of God.
3) He could know if he himself became man.
History repeats itself and mankind or human nature is predictable. Who would know this more than God.
Matthew 7:13 [ The Narrow and Wide Gates ] Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.
Matthew 7:14 But small is the gate and narrow the road that leads to life, and only a few find it.
God always sets the paths before us but the decisions are ours to make. Plus, what would really be immoral is if we had a Creator who struck us dead anytime anyone disobeyed him; like the way many (human) rulers have done throughout history.
Humans are creative too but God is the most creative. I believe God is (the best way to explain) a step (or two) ahead of us which would mean that he has a lot of responsibility but even if that's not the case and he made everything and is now just watching everything play out; it would be like watching a movie...I like watching movies
(just kidding). Anyway, time doesn't exist for God and how free will and God's will balance out is something we will never know. God willing we'll find out after death.