One of Russia's reasons for invading Ukraine is to remove the Neo-Nazis. Some people scoff, but this article from a mainstream, international, website explains the situation well. Ukraine was a WWII battlefield, and it was torn between the two sides. Ukraine had partisans who fought for the Nazis. Some of these people are considered heroes by many in the country.
After the fall of the USSR, many Ukrainians with fascist tendencies, who were suppressed, began to become influential again.
This eventually led to the rise of Neo-Nazis, and entities like the Azov Battalion. This was formerly a militia, but has now been incorporated into the regular army.
Old, Nazi symbols are recycled by the Azov Battalion to represent their fascist ideology. The leaders of this movement were tied to the original Nazi partisans from WWII. There is a definite link that reasonable people cannot deny.
The article covers more ground than I could put here, so if you are really interested, I suggest reading the whole article. Discuss.