Someone did a count-up of God killing vs Satan Killing in the Bible.
Bible Score was God: 3270000, Satan 10.
The Quran was God 4, (Lot's wife, Noahs kids..& someone else) Satan Nil.
Someone did the counting wrong. They forgot the people of Aad and Thamud, people of the Sheba, and on....
As these were infected with the illness of Shirk and Apostasy, so has to be eradicated. Same as a part of the body becomes useless and in fact its infection can spread all over the body thus rendering the whole body useless.
This the way of God in which HE cleanses the society but not before sending HIS medications in form of Prophets and Divine Books.
His is the most best way. The Lord of all.
