WHY WHY WHY could God not just wipe the slate clean and say "I am not going to kill anybody today because they are descended from a couple of naked people who ate a piece of MY fruit."
OH NOOO NOOO NOOO - he decides to pick a race of stone age nomad savages, tells them to slaughter everybody living in the Levant and breed like rabbits untill the Messiah appears.
Then, depending on which version of "Messiah " you believe in he may or may not kill you and send you to be tortured forever by another imaginary being called the DEVIL, who was thrown out of the Celestial House, and pushed under a bus for disagreeing with said God.
And they all lived happily ever after eating food grown in soil fertilised by the blood of billions of children and others who, like the Devil maintained that none of this revenge and propitiation and "you are soooo wonderful" stuff makes any sense at all.
HB