Video of the torture of a white disabled man by four young blacks in Chicago has been all over the news over the past several days.  Pundits and politicians on both sides of the isle have condemned those involved in the incident and the suspects have been charged with hate crimes.  But the larger question is what has induced the level of hatred between the races exhibited in this incident, and numerous others reported over the past two years involving black thugs sucker punching non-blacks, wilding incidents where groups of mostly young blacks have randomly attacked non-blacks, and the now weekly reports of police officers shot, sometimes in ambush, by black suspects.  Heather MacDonald has this piece in the City Journal which focuses on an urban culture that breeds racial hatred.  I should note here that the strong influence that culture has on criminal activity has been exhaustively documented in Professor Barry Latzer's excellent book "The Rise and Fall of Violent Crime in America."