The best estimates put total losses on all sides from all causes in all venues at 8 million.
Bernard Haykel, Professor of Near Eastern Studies at Princeton, knows a thing or two about sloppy, exaggerated, scholarship, and politically correct slurs, quoted here:
'If there are any lessons about ISIS that can be drawn from what happened during the Protestant Reformation, Bernard Haykel said, those lessons are "terrifying."
'"If we're embarking or are actually already in something like the Reformation in the Muslim world, then, you know, hold on because we're in for a really wild ride with lots of violence," he added. ...
'"Christianity was a violent religion at times, extremely violent, in fact, much more violent than what we're seeing with the Islamists today. If you think of the 30 Years War, something like 30 percent of Germany's population was killed, tens of millions of people," he said.
'Haykel also noted that ISIS is similar to the Protestant Reformation in its emphasis on individualism.
'"The individual is at the core of this [ISIS] movement, the autonomy of the individual, the decision of the individual to make decisions despite, and even against one's own family, which flies in the face of Arab and Muslim tradition," he said. ...
'"Calvin was a really nasty guy. Okay? I mean, read up about him — and there's a huge, a big statue of him in Geneva today — but people forget actually what the city he led was like under him."'
Haykel is the son of a Lebanese Christian and a Polish Jew.