NATO has moved 800 miles to the east, and over a wide front. Their statements and activities indicate their goal is to go all the way to the Russian border. That’s the threat.
And Right Sector and Svoboda and Banderists are quite nazi, even if you don’t like it.
NATO has not "moved 800 miles to the east". Former soviet union countries, scared of Putin's belligerency have all applied for membership to NATO.
NATO is NOT an offensive pact threatening Russia. There is NO NATO army stationed anywhere near Russia, that's a credible threat of invading Russia.
There are ultra-right parties in every country. In Ukraine in the last election, all the ultra-right parties in Ukraine received a total of only 2% of the vote.
In the last election in Russia the communists received almost 20% of the vote.