Such declarations will be subjectively interpreted to mean anything.
Perhaps not.. Maybe the Russian Government see Jehovah's Witness extremism coming from them teaching people that every worldly government will soon be completely destroyed and for people to put no faith in them what so ever. The sect’s leaders have continually denounced all other religions and all secular governments as tools of the devil, demanded they refrain from all pledges of allegiance to earthly governments and have historically displayed of contempt for “Satan’s world,” which included all other religions and all secular governments. Including that of Russia.
Perhaps they don't think it healthy or beneficial to have such a group of people expounding their rather extreme anti-government ideas so freely among their people.
Just a thought.