SadPole :
they hang onto that nonsense that it was all Russian-military procedure flight [...]not a civilian flight in accordance with international aviation rules,
Pity copy of the Flight plan is not annexed in the report. The box "Type of Flight " would clear that up. I bet you it does not say "M" ( Military) and that it was a GAT flight plan and not an OAT/Military one.
Preparation of that flight plan seem to indicate ( again reading the report) that it was botched from the outset. (e.g selection of an alternate Aerodrome closed by Notam, no selection of APP type , etc. )
I have seen the same CIV/MIL confusion being played by the Germans after the loss of their Tu154 off the coast of Namibia. There the wrong flight plan payed a major role , but , even to that day the German air force still denies it.