You wouldn’t know unless you searched each, and every little detail would you?.
Seems the Crimean Tatars are Sunni Muslims, and due their history with Stalin they are quite anti Russia. NO mention of them being Sunni Muslim’s in the link you provided, so had to research to find that tidbit.
Apparently, (my conjecture) the Takfiri must be shiite as Takfiri is defined as one muslim accusing another muslim of NOT being muslim enough such as is the case seemingly between the two sects.
With regards to the FARS story I do read it as a hit piece against the Saudi’s by Iranian propagandists though.
Simple. The sunni believe that the shia are takfir (not fit to live) because they (the shia) dispute the succession at the time of the death of Muhammad.
‘Takfiri Fighters’ are the fanatics bent upon the destruction of Syria...and all Syrians other than sunni.
Shouldn’t have to be drawing you pictures so long after 9/11.
And when the Tartars threatened to bring them ‘home’ to fight in the Crimea, FARS picked it up and printed it...AFTER NATIONAL GEOGRAPHIC NEWS.