This is pretty spot on.
I think the Orcs will always be a better allegory of the Mongols. Highly militaristic, complete domination and destruction of their enemies, barbarian romanticism. The various Khans sound just like warlords of the Horde, and even the term Horde comes from the Mongols. Genghis Khan is a better comparison to Garrosh Hellscream in my opinion. It's a little obvious since the orcs have basically been modeled after Mongols since the first Warcraft, but maybe that's why I like Garrosh so much; the Mongols were the OG bad asses.
Didnt mean to tear your argument apart, but this is fun. Whats next, how is Illidan like Richard Nixon?