A new account is used to promote violence and spread militant propaganda and at the same time provoke other users and communities. If they are agitated and reply, they get banned. If they don't fall for that, they get banned under another pretext at some point.

That very user also posts in various English-speaking subs, using similar incendiary rhetoric. I don't believe he would do that freely without someone noticing, his posts are ISIS level threats. So perhaps we are witnesses to some entity trying to start a bloodshed. I really hope public awareness will stop them.

Though this is a special case, the use of agitators happens on many "country subs". Here is an expose and a paste link for another country sub on reddit.

Troll farms are not unusual and many political parties and organizations or even countries have been exposed for using them. In Greece, it was revealed that professional trolls employed by a major party were paid 60 european cents for each post on twitter. In one case, they were caught using mugshots from US for their accounts.