I voted probly not. Genocide by the government can just about be completely ruled out, because of the existance of the UN, Amnisty International and other organizations... that and they'd have the US breathing down their throats, especialy if there were alot of american casualties. Economic trade would take a huge hit as well after the media got a hold of the news.

any sort of massacure by any country is almost an impossibility now days; however if it were a movement carried out by individuals, then it might be possible.