> it isn't impossible that there are some
Actually, it's pretty evident that there are many. They surely still are a minority across the whole population, but they are definitely a strong one at that.
The unit you're referring too is the Azov battalion. It's a paramilitary unit that has been condemned for ISIS-like war crimes, mostly against the people in Donbas. This unit has been legitimized and fully integrated into the Ukrainian army. Its leader has strong ties to Ukraine Ministry of the Interior.
Also worrying is that on Jan 1 every year there are very popular marches (10-20k people in Kiev) in honor of Stepan Bandera, a Nazi collaborator and "national hero" in Ukraine.
Bandera and other Nazi collaborators that participated in the murder of around 100k (!!!) Poles, are now glorified thanks to a 2015 law which imposes criminal sanctions (I believe 5 to 10 years) to anyone who insults their name.
I'm on mobile and cannot provide sources right now, but I believe this is pretty uncontroversial stuff which you can corroborate with a little bit of digging.