Earlier quoted context omitted.
It's confirmed. And the party in question is quite extreme, at least by Swedish standards.
According to polls[0] the party gets ~20% votes in their region. IMHO 20% of voters can't be "extreme" [0] https://www.svt.se/nyheter/lokalt/orebro/orebropartiet-nast-... (swedish)
Was the NSDAP "extreme"? They got 43.9%