More people have been killed in the 20th century than all the previous 19 centuries combined.  The common theme?   Atheism.
 
Russia – Stalin and others- 100 Million dead
China – Mao Ze-Dong – 60 million
Cambodia – Pol Pot – 1.7 million dead
North Korea – King II Sung – 1.6 million dead
Yugoslavia – Tito – 570,000 dead
Communists – Suharto – 500,000 dead
Croatia – Ante Pavelic – 349,000 dead
Vietnam – Ho Chi Min – 200,000 dead
Germany – Hitler’s as atheist or not is disputed – but 12 million dead if true.
 
If you have no moral framework, then life doesn’t much matter.
Make no mistake.  To reject God has deadly consequences just by the nature of the fruit of belief.