32,000,000 Christians Killed by Atheists
Srdja Trifkovic describes what he calls "by far the greatest crime in all of recorded history" in New Martyrs of the East and Coming Trials in the West:

Persecution and martyrdom of Christians under 20th century totalitarianism—mainly of Russian Orthodox Christians under Bolshevism—is by far the greatest crime in all of recorded history. It is several times greater than the Holocaust in terms of innocent lives brutally destroyed. It has killed more Christians in a few decades than all other causes put together in all ages, with Islam a distant second as the cause of their death and suffering. And yet it still remains a largely unknown, often minimized, or scandalously glossed over crime.

According to the respected and reliable OUP World Christian Encyclopedia (2001), there have been many more Christian martyrs in the 20th century—over 45 million—than in all of the preceding 19 centuries of Christianity. Of that number, some 32 million were killed by “atheists” and over 9 million by Muslims. The “atheists” denote, overwhelmingly, Soviets and their Communist cohorts and satellites, but also include Nazis and their allies. The Spanish Republic was an especially efficient Christian-killing machine. In terms of the size of the targeted population and the timespan of only two and a half years, the Compañeros did almost as well as the Tovarishchi.

Nota bene: With the title of this post, the blogger means only to mimic and call into question the anti-religion rhetoric one finds among many atheists.