By Howard Beck A newly formed coalition has raised its concerns to NBA Commissioner Adam Silver. A coalition of social justice activists is demanding the ouster of Robert Sarver as majority owner of the Suns, citing the numerous accounts of racist and sexist behavior revealed in an ESPN story last November. The group—which includes members of the Rev. Al Sharpton’s National Action Network—detailed its concerns in a March 11 letter sent to NBA commissioner Adam Silver and on a website it launched today, under the hashtag: #SackSarver. “We are profoundly disturbed by the reports of racism, misog…