Well….Let’s say God is Thanos.
The world was going crazy and on the other side the Ozone Layer was Tearing down bit by bit , Global warming levels increasing alarmingly , Deforestation happening everywhere continuously, Oxygen levels decreasing , Polluted Constituencies Booming , God came to know bout this shit.
He wanted something to happen so that the Mother nature lives and doesnt get destroyed by the evil, for the Evil the Humans have Become.
He (God) watched The Avengers series ( thanks to Marvel crew) and Liked the idea of the Supervillain….Thanos.
He became Thanos , for a bit , and his main idea was to Kill Half the planet’s humans , to save the other half.
But he is God right ? He doesn’t do Cruel to his Kids. But only if the Kids cross their limits, do they get the punishments.
So yeah , Biology was Key. Where it all started , it all ends. He created a Respiratory Syndrome, and gave it the powers of a virus. ( Lets call her Gamora, Cuz she looks green and most probably would’ve been hit by a Virus too) . So Gamora , who wants to show herself more powerful than her sister Nebula ( SARS) ,performs in the arena ( The world) in the deadliest way possible.
This is all to Control the More deadly harm to Mother Nature herself ( In God’s Defense)
So yeah guys….Ultimately, Thanos is the one who kills Gamora too , So yes ,God will be the person to Demolish the virus he created too, But only after The punishments are witnessed by his Children , be it Death , for performing cruelty to Other organisms and Nature , to get Harmony on Earth , be it the Soul Stone.