Swede here. As far as I know he was never a swedish citizen. I think most swedish mma fans never felt he represented Sweden and was only invested for his entertaining fights. People were never down with his Kadyrov stance. He got interestingly little attention from the media as well which may have been due to him getting convicted for assault in 2018 for punching a worker in department store. There were some articles about him here and there but never any media push - despite being a really good fighter he, like Gustafsson, has the charisma of a grey rock.