The composition of the Free Syrian Army is the most sensitive issue at this moment because we have been very critical about it. I think these troops are somehow controllable, but there is no guarantee for the future. Experience shows that, in the end, these kinds of groups are steered by global forces. Yet, Turkey considers these groups as moderate opponents to the regime, but we know that Syria and the countries supporting it like Russia consider these groups to be terrorist organizations. So, I believe this is the most difficult issue for Turkey to deal with in cooperation with neighboring countries and Russia. I think that in the upcoming stages of the operation in Syria, this issue will be coordinated in detail with regional countries as well as with Russia. This problem should be solved if we want to create a united front against terrorist groups and the countries supporting them.
Source: The objectives of operation “Euphrates Shield” | Katehon think tank. Geopolitics & Tradition – 8/29/2016.