Almost every country has some degenerates who identify with Nazi ideology, but Ukraine's Nazi problem is rather small and receives little support. Ukraine is the only country in Europe whose head of state, Zelensky, is Jewish (elected with 73% of the vote). In the last election, a coalition of all far-right parties won 2.15% of the popular vote, and since that didn't meet the threshold of 5% failed to gain any parliamentary seats. The false narrative of Russia's boogeyman, Azov, is summed up well here: youtube.com/watch?v=2gNp0PfK0CI but I can try to answer further questions you have about them.Pretty disturbing how Ukraine and Russia have a big neo nazi problem.
Same ideology which saw them as subhumans and inferior.
Germans butchered lots of Eastern Slavic peoples because in their future lebensraum they will colonise much of the East by wiping out Slavs who lived there. Now today you have lots of Slavs supporting this ideology that was mainly about Germanic supremacism.
I myself am Jewish and never encountered any racism while living in Kyiv, nor has anyone else I know who is Jewish or Muslim. Ukraine has a lot of Crimean Tatars who we consider our fellow citizens and the native inhabitants of Crimea. Under Stalin, in three (!) days, 190,000 of them were deported and murdered to increase the Russian portion of the population in Crimea. After the collapse of the Soviet Union many of them returned to Crimea and their population went from 0.2% in 1979 to 12.6% in 2014. Tragically after Russia's seizure of Crimea repressions of Crimean Tatars once again began, and many were forced to flee to other parts of Ukraine. I now know several Crimean Tatars living in Kyiv, but many are still living in Uzbekistan and elsewhere as a result of their expulsion under Stalin. Once Crimea is returned we would like to see more of them return and play a bigger role in deciding Crimea's future.