There's opposition in Europe to Turkish membership because these are the inevitable fears of energetic, poorer, Muslim outsiders who will come in and work hard and take jobs. There's also a fear that under E.U. rules Turkey might get a disproportionate amount of cohesion funds and agricultural subsidies - although it's quite clear that Europe is changing its rules, and that there will not be very much in the way of net transfers of resources from Europe to Turkey.