As a counter to those few posters who try to use the existence of the Asov Battalion as a justification for the “need” 
for Russia to invade in order to “de-nazify” Ukraine quite apart from the fact that both the President and the PM are Jewish 
, this is useful to put the so called "risk" into perspective:
In the 2019 Ukrainian elections, the far-right nationalist electoral alliance, including Svoboda, National Corpss^, Right Sector, Azov Battalion, OUN, and Congress of Ukrainian Nationalistss^, underperformed expectations. In the presidential electionn^, its candidate Ruslan Koshulynskyii^ received 1.6% of the vote, and in the parliamentary electionn^, it was reduced to a single seat and saw its national vote fall to 2.15%, half of its result from 2014 and one-quarter of its result from 2012.
Quote is from Wikipedia but I’ve checked the sources and I’ve seen the same info across a range of analyses - Wikipedia just puts it the most succinctly.
This article also makes a similar point (although you have to get to near the bottom of it). Genuine Nazi and far-right support is probably higher in other countries - like the USA, Hungary, Poland, France, Belgium, Italy, Sweden….. and so on
https://www.npr.org/2022/03/01/1083677765/putin-denazify-ukraine-russia-history