Suzied, a quick Google reveals:
Deaths under atheist regimes
‘Mao Ze-Dong (China, 1958-61 and 1966-69, Tibet 1949-50) 49-78,000,00 people murdered
Jozef Stalin (USSR 1932-39 only) 15,000,000 people murdered
Pol Pot (Cambodia, 1975-79) 1,700,000 people murdered
Kim II Sung (North Korea 1948-94) 1.6 million people murdered
Tito (Yugoslavia 1945-1987) 570,000 people murdered
Suharto (Communists 1967-66) 500,000 people murdered
Ante Pavelic (Croatia 1941-45) 359,000 people murdered
Ho Chi Min (Vietnam 1953-56) 200,000 people murdered
Vladimir Ilich Lenin (USSR, 1917-20) 30,000 people murdered
Adolf Hitler (Germany 1939-1945) 12,000,000 people murdered’
[Total roughly 90 million.]
‘[These] are the generally-accepted death counts from atheist regimes of the 20th Century. I think it’s important to note that these figures are the most conservative I could find. For instance, Stalin’s death toll is only for the 1930s.
Hitler is a special case in that he is a right wing rather than a left wing killer. What this means in practice is that Hitler pandered to Christianity in his early rise to power, then took over the churches once he got in power. He enforced this by imprisoning and killing large numbers of bishops and Catholic priests as well as protestants. Anyone who tried to stand for the Gospels in his regime was signing their own death certificate. According to documentaries I’ve seen on the History Channel, Hitler made fun of faith and religious people in private.
In my opinion, claims that Hitler was a Christian at the time he committed these crimes (he may have been as a child, I don’t know) or that Stalin was a Christian, which I’ve also heard, put the claimants in the same intellectual space as holocaust deniers.
Read more at www.patheos.com/blogs/publiccatholic/2013/03/atheist-governments-of-the-20th-century-the-death-toll-of-godless-goodness/#e7fIbCaTX4M6KxDt.99’
Deaths in the name of religion
‘[A]n objective look at history reveals that those killed in the name of religion have, in fact, been a tiny fraction in the bloody history of human conflict. In their recently published book, “Encyclopedia of Wars,” authors Charles Phillips and Alan Axelrod document the history of recorded warfare, and from their list of 1763 wars only 123 have been classified to involve a religious cause, accounting for less than 7 percent of all wars and less than 2 percent of all people killed in warfare. While, for example, it is estimated that approximately one to three million people were tragically killed in the Crusades, and perhaps 3,000 in the Inquisition, nearly 35 million soldiers and civilians died in the senseless, and secular, slaughter of World War 1 alone.
History simply does not support the hypothesis that religion is the major cause of conflict. The wars of the ancient world were rarely, if ever, based on religion. ...
Medieval and Renaissance wars were also typically about control and wealth ...
Most modern wars ... were not religious in nature or cause. While religious groups have been specifically targeted (most notably in World War II), to claim that religion was the cause is to blame the victim and to misunderstand the perpetrators’ motives, which were nationalistic and ethnic, not religious.’
From a Huffington Post article:
www.huffingtonpost.com/rabbi-alan-lurie/is-religion-the-cause-of-_b_1400766.html
I’m sure there’s more out there - I’ve definitely seen a comparison of the two totals somewhere - but I have to go out so have run out of time.