Yep, can of worms. With many facets.
http://www.project-syndicate.org/commentary/the-gulenist-subversion-of-turkey-by-dani-rodrik
http://balyozdavasivegercekler.com/2012/11/05/fethullah-gulen-the-jews-and-hypocrisy/
Spengler on Turkey
http://www.ruthfullyyours.com/2013/04/23/david-spengler-goldman-turkeys-ticking-debt-time-bomb/
http://www.ruthfullyyours.com/2012/01/09/david-spengler-goldman-recall-notice-for-the-turkish-model/