I guess Pakistan should stay out of it as Turkey might be a muslim country but it is the most secular muslim country,,, and attack on Russian plane was on instruction of NATO and against another Islamic government (Assad, no matter he is Shia but as long he recites Kalma is is legally Muslim)... So nor Turkey is right whereas Russia is partially right as it is supporting the legitimate government,,, Furthermore, Russia also acted responsibly while pushing Assad to hand over chemical weapons,,,
In this conflict Russia seems to be on right side and against oppression of ISIS and west,, whereas on the other side there are Turks which are Muslim,, so its better that we should avoid taking sides...
The only positive rule Pak could play is to help them establishing di[plmatic relationship between the countries ... That would be greatest role if we could do,,,
Same rule of Pakistan would be ideal in case of Yemen War and Saudi , Iran conflict ...