There are two probable causes that are coming up in the opinions expressed by most of everyone.
1) Overwhelming majority of western/white people involved in the manufacturing of video games
2) Biggest markets being in the west.
I think both the factors work to create this outcome.
Personally I don't get that bothered that I have to play as white/westerner. I identify with my characters and feel for them.
The games that bother me are the ones with a hidden political/social/military message that I don't agree with.
Crackdown disturbed me incredibly and I don't like Tom Clancy stuff coz his message just seems like picked straight off from Bush and Co. With the prevalence of these big military shooters though I was really galled when I saw some neo conservative riling against an Arab video game on t.v one day. I think that reeks of double standard

It is better to die on one's feet
then live on one's knees







