Free Will and Loving/Rejecting God

[Whateverist]

My question is why is free will necessary only for modern people and not bronze aged nomads or the angels?

Well there is your problem. You're trying to make sense of that which is to be accepted on faith. To be as faithful as Drich requires you to suspend all efforts at making sense of any of it. Only then will the holy spirit come inside you (if you laugh here God will strike you down) and cause you to babble with the tongue of an angel. If you make it this far you may join the ranks of the saved which everyone else will call the undead. Let the sinners laugh. You will know that only a babbling fool makes it into heaven where he will have a seat at the table with God Almighty. Of course, you won't know what anyone else is saying but that's alright, neither do they. You will all bask in the perfection of mindless babble and a well deserved sense of superiority. Thus sayeth the Drich.