but nevertheless—you also have to consider the respective population sizes and advances in technology and statecraft that have allowed repressive regimes to be far more viciously effective in the past 100 years than in the 1,900 years of Christian history before that.Wait a minute. Both Christians and Atheists were alive and thriving in the 20th Century. Both had the opportunity to murder millions in the 20th century, yet only the Atheists chose to do so.
I already explained that — Christian institutions were stripped of political power a few centuries back (and afterwards, lo and behold, learned the value of forebearance and tolerance).