These are Russian GRU troops out of uniform. No different than Ukraine.
Supporting one Syrian faction over another, particularly one which is likely to go islamic, is not something to risk
a confrontation with a nuclear power.
The US needs to get out of the squabble in Syria.
Where is Washington when we need him? (’stay out of foreign entanglements’)
Bomb the hell out of the Russians!
I wonder if Putin ordered incineration vans to Syria?