re: Climate Scientist Calls for Mass Depopulation to Fight ‘Global Warming’

Makes sense. When you don't have an objective source for morality through God's moral law, you become a law unto yourself. If your law says that humans are just more complex amoebas with no inherent value and rights from God, then human life can be snuffed out for "the greater good", which is essentially arbitrary goals for individuals applied at the societal level.