Syria is a real mess. Perhaps the Syrian gouvernment hit Al Quaida with weapons of mass destruction, or Al Quaida was storing this weapons and it was set free by a conventional attack. Who knows.
The real problem is, that the gouvernment of Syria is hardcore antisemitic in a more or less secular way and is supported by Hisbollah and Iran - our enemies
and the opposition Al Quaida & affiliates and IS are hardcore antisemitic even eliminatoric antisemitic in an Islamic way, like they have proven in Israel France India etc.
Imo the whole Islamic middle east is a mental asylum haunted by an extreme evil spirit that has caused so much evil and suffering in the first half of the 20th century.
For the gouvernments in Europe and in America it would be a duty to tell them stop in a way they understand, but they get involved on the one side or the other. It is a big shame!
On my shame list are all of them inclusive Russia. God will give them an approbiate answer.