Uncle of the two brothers says they ' ve brought shame on all Chechens . Chechen rebels started out fighting for independence from Russia in the 1990s . Conflict has racked the North Caucasus region for almost two decades . Aiding the rebels ' efforts , according to the Council on Foreign Relations , has been an influx of foreign Islamist militants ready to fight for the cause . Dagestan and Georgia have experienced violent clashes in recent years .
Uncle of the two brothers says they ' ve brought shame on all Chechens . Chechen rebels started out fighting for independence from Russia in the 1990s . Conflict has racked the North Caucasus region for almost two decades . Dagestan and Georgia have experienced violent clashes in recent years .