Of course I am not a involved in diplomacy. However, I can see certain things. Turkey is an ally of NATO. It would be much easier to establish a relationship with the Turkish government than with Syria.
First, people have to be made to understand the gravity of the situation within the Turkish government. Second, we have to find a way to contact Syrian authorities to let them know that the current situation will soon become a problem of survival for all of the communities over there, especially the Christian communities, and a solution must be found.
To my mind, we have to start with Turkey.