As sad as it may be some people can't get over the fact that an African American is part owner of a major sports franchise in the year 2012. That fact was made very clear in an article by New York Post writer Phil Mushnick, who attacked Jay-Z in his "Equal Time" column printed Friday [April 4].   Jay-Z is a minority owner of the New Jersey Nets, who will become the Brooklyn Nets in 2013 when t…