I'm not bothered by the game at all. I have read some of the controversy surrounding the game, but to me its as simple as this: Play it if you like, if not then dont play it. Really is as simple as that. Why would it bother you that someone else plays this game, you know? I probably wont play the game, it doesn't lok particularly fun, but others should go right ahead if they want. Who am I to judge?
Also, there exist much more disturbing games than this. Some of the Silent Hills games, anyone? Thats some disturbing shit right there (Not implying Silent Hills should be off limits or anything, they are great games). Hatred is just some mindless violence, which pretty much everyone does from time to time in GTA, as already stated by others. People just need to grow up to be honest. Not everyone shares your opinion, and just because you find a game "sickening" doesn't mean that others should be kept from playing it, or that you should try to force your opinions down someones throat.