Them tribal sheikhs (whether pro Iraqi gov or against such as this one) are illogical retards. He doesn't represent anyone, just another old guy hiding in Erbil or Amman. Many other 'sheikhs' of Sunni background such as the Mufti of Iraq stand against Turkish involvement.
Hassan Hassan is an IS supporter, he makes his living off of the existence of IS (he wrote a book about them), he needs them to stay alive otherwise he'll be forced to find a real job.