Well that is the ABC of politics. Shooting down aircrafts of a nuclear armed country, with in its own airspace, to defend a runway of a allie that can be fixed is a simple calculation. Big NJET NJET! Chess not poker.
Russia als could offer s400 to Hezbolla…haha. Would love to see that convesation. Nasarall smiling without saying a word, quietly leaving the room. Hezbolla field comanders hecticly shaking their heads saying: njet njet in thick arabic accent. Or Hezbolla asking for s400.
The situation is what it is since years. The damage is calculateable and as long personal loss is minimal nobody will do something about it.
Anyway…as i wrote i dont know if the last attack was actually carried out like that.