Ha!...What seems fair to us may not make much difference to God...Would seem that Esau and Ishmael didn't think God was too fair...
I'm not too big on Calvinism...Seems there's too much evidence in the Bible that we ALL have the choice to call on the Lord and get saved...I believe it was the church that was predestinated, not the individual....
You're sidestepping the argument by declaring God to be whimsical, capricious and unpredictable.