Calling either Russia or Ukraine Nazi is just historically incorrect. Neither are run by national socialist workers parties, which is what Nazi used to mean.
Of both only one is the aggressor in a bloody war against their neighbor, seeking territorial gain. The to and fro accusations of being Nazi really don’t help. There’s racist people in both sides some who actually think Nazi insignia are bad ass.
What really matters is actions, and from my limited understanding, that needs research after this had finished, is that the Russian side is more involved in cruelty, and that the Ukrainians show restraint and try to step up to try and uphold war conventions.
Actions are more important than words. None of them are Nazis, some of them may act like them.