by Burak Bekdil, The Gatestone Institute
Although nominally participating in the international coalition fighting the Islamic State, President Recep Tayyip Erdogan has covertly aided its advance.
In theory, Turkey is part of the international coalition that fights the Islamic State (IS). Since it joined the fight last year, it has arrested scores of IS militants, made some efforts to seal its porous border with Syria and tagged IS as a terrorist organization. Turkish police have raided homes of suspected IS operatives.