Invite Sunni Turkey's invasion to support Sunni Arabs to take and administrate Raqqa

U.S. Planning to Start Assault on Raqqa Soon to keep the pressure on ISIS as the battle of Mosul proceeds in Iraq. But the tactic of using the Kurdish pesh merga as an imperial force to conquer a Sunni Arab city is contrary to the region's move toward a balkanizing of Shiite, Sunni and Kurdish tribes into their respective states.  Better to invite Sunni Turkey to invade Syria and give Sunni Arabs support to take and administrate Raqqa because it does't conflict, in other words not trying to unite allies "who essentially loathe each other", with the regions ethnic separation.