I don't figure that Muslims killed more than a 2 million people or so in political violence in the entire twentieth century, and that mainly in the Iran-Iraq War 1980-1988 and the Soviet and post- Soviet wars in Afghanistan, for which Europeans bear some blame. Compare that to the European tally of, oh, lets say 100 million (16 million in WW I, 60 million in WW II - though some of those were attributable to Buddhists in Asia - and millions more in colonial wars.) Belgium - yes, the Belgium of strawberry beer and quaint Gravensteen castle - conquered the Congo and is estimated to have killed off half of its inhabitants over time, some 8 million people at least. Or, between 1916-1917 Tsarist Russian forces - facing the Basmachi revolt of Central Asians trying to throw off Christian, European rule - Russian forces killed an estimated 1.5 million people.

https://mohammedjehankhan.wordpress.com/2013/09/20/is-islam-more-violent-than-other-religions/