That's a total of about 390 million lives from 21 wars (approximately 'countless trillions' of gallons of blood spilled), yet mankind finds a way to glory in that. Then there's the survivor's,...how many wish they hadn't survived? Then there's the corporate and government corruption artists, the criminals and pharm/med, etc.
So, the naysayers pick on religion as the culprit of humanity (for their conscience), what do you expect?...all is normal (standard operating procedure).