Yes, it´s difficult to have any meaningful organization going unless you have some support among the population and the Russians are likely to have that covered. Unlike authorities in western Europe which seem to just love having this terrorist vermin organize under their noses. There´s even no-go zones to make sure that they can prepare in peace. Then the authorities act all surprised when they get attacked.
Western Europe is rapidly turning into a shit hole. A large number of European ISIS members are coming back to their home nations, after getting their asses kicked by the Russians in Syria. For the ISIS jihadis, now the European Union is more safe, at least when compared to Syria. Sweden is even planning to rehabilitate these barbarians.