Hitler and Stalin were active combined for roughly 45 years. 45 * 9 = 405. It would take 1000 years and then some less for Hitler and Stalin to rack up the kill tally.

Plus, neither Hitler nor Stalin's official kill tallies involve war losses, while the Islamic one likely counts it, as they're part of Jihad.

You've sunk to a massive low when you use two leaders that ruled for less than half a century combined up against an entire religion that has lasted for nearly one and a half millenia.