Idlib is a Regional Relationship Stress Tester
As has been stated and restated here, there are geo political players in the Syrian arena that would benefit from having Turkey and Russia at each other’s throats. In Idlib as well as elsewhere. So far Russia and Turkey have continued to cooperate, but, there looks to be some more recent attempts at creating discord.This recent stirring of the pot along the M-4 highway does not benefit Turkey. It does benefit others.