Honestly now... how could Russia consider them terrorists... when they do such a lucrative business with their sponsors?!
That is a truism. There is also a historical precedent. Iran (Persia) and Imperial Russia had very close ties for most of the Romanov era. Those ties were disturbed during the aberrational Pahlavi dynasty that found power as a result of the bolshevik menace and it's penetration of the northern part of Iran (Azeris).