"DEI is racist because reverse racism is racism, even if it is against white people (and it is remarkable that I even need to point this out)," Bill Ackman wrote on X.Patrick McMullan via Getty ImagesBill Ackman's crusade against on-campus antisemitism ain't over yet.Claudine Gay may not be Harvard's president anymore, but Ackman has identified the real enemy: DEI.Ackman says DEI is the "root cause of antisemitism at Harvard."