P-89 Scorpion said:
Brown dudes? Call of Duty 1 - 3 and World at War are against German's, Modern Warfare 2 and Advanced Warfare are against American's and Modern Warfare 1 and 3 and Black ops 1 are against Russian's all white guys, that's 9 out of 11 games.
CoD4 : pretty much every enemy you fight as the U.S. are Arabs or Arab-looking peoples of Unspecifiedistan. As the S.A.S. you do fight mostly Russians, correct.
WaW: As the U.S. you fight the Japanese. The Soviets fight the Germans. (Unfortunately the British campaign was cut).
MW2: Mostly Russian enemies. Right at the very end you do indeed fight some Americans and very early on you fight some Brazilians and some Afghans (separate levels).
BO1: Mostly Russians again (if memory serves), some Vietnamese, some Cubans, and in one level, a handful of British troops (S.A.S. I think).
MW3: More Russians, a few Africans, can't remember too much about this one.
BO2: I don't even know.
Ghosts: Mostly Middle/South-Americans, I think?
AW: I think you fight a PMC or something?
It's not all about shooting brown dudes, but there's quite a large helping of brown dude shooting in there. Can't really be helped when the core of the game is "shoot dudes".