The mayor of Konotop is a Ukrainian nationalist and member of the Svoboda party. He is far right-wing and probably anti-semitic. Calling him a neo-Nazi is taking it a bit far though imo, unless you're willing to call far-right UK politicians like Farage neo-Nazis too.

Party Svoboda holds 6 out of 450 seats in Ukraine parliament. That's about 1.5%. Not exactly a strong voice in the country.

As for Bandera, he was an anti-semitic and anti-Polish Ukrainian nationalist. He declared an independent Ukraine and tried to align it with Germany in 1941. He got thrown in jail. There were more than a few countries who bordered or were part of USSR that aligned with Germany in WWII: Finland, Hungary, Rumania, Bulgaria and Ukraine (tried to align). Finland and Rumania had already been attacked by Russia, and Ukraine suffered under Russian domination in the USSR.

No-one now says that any of those other countries were run by Nazis or were full of Nazi sympathizers in WWII. Putin now says Ukraine is. Hmmm, wonder what purpose that serves him...