First and foremost I believe in good and that all are born good but during the path of life we decide what path to take, good or bad. Its a sin to kill, then how come god ended all life except those on the boat with Noah? This I do not understand!
That’s where you and scripture differ. The bible says that mankind is evil and has been evil since the fall. Read Genesis 6:5 it even gives God’s reason for the flood. As far as children, God owns them wouldn’t you agree he has the right to end their life? He made and owns all of creation.