Oh yes, we have had. A lot worse than football hooligans, these black clad figures act as if they were somehow entitled to kick people THEY define as fascists (or actually anybody who has the bad luck to be in their way). If it looks like the police might catch a few they disperse. Almost straight from The Maoist Insurgency textbook.You have many Antifa incidents in Finland? ( I think I have your location correct ).
Though nowhere as bad as in the US. At least not yet.