I don't really have THAT much of a problem with it, but this game seriously paints the world in a pretty simplistic manner and that wasn't what I was expecting from the hype. It is basically "go kill these racist assholes, they don't even deserve their flying city really. oh they are also crazy fanatical mormons, you are probably atheist, so go wild with that too". All the while Booker, who we in the 21st century need to relate to, is a product of the same era is somehow above that nonsense despite just being a dumb soldier/thug/brooding drunk(?) who really shouldn't know better (not that he is righteous or anything, he is just clearly apathetic and guilty, because that fits the game's cynical tone I guess and can be contrasted with the naive, innocent Elizabeth). I haven't reached that point yet, but I know the Vox will also be revealed to be assholes, because the world is messed up man.
That being said, it is not like explicit racism in all its grotesqueness is commonly displayed in videogames. So it is at least novel.