the best explanation i could find for the random national socialistsm sprinkled in ukraine: there were several militarized ideologies in ukraine that formed during conflicts in 2014, including neo-national socialist, communist & anarchist elements. they were mostly unofficial volunteer regiments and paramilitaries that ukraine's army loosely funded during the more trying times of the donbas war. when the current war broke out all of them simultaneously gained traction and volunteers due to being some of the only armed groups in the area. azov is the big armed neo-national socialist faction in ukraine atm and judging from the rare combat footage of them they maintain a weak alliance with the rest of pro-ukraine forces but will occasionally skirmish with them, either through lack of communication or their own agenda to control ukraine. there is also unconfirmed footage of them committing various war crimes, including zip-tying, butchering and cannibalizing alleged enemy soldiers
war tends to bring out the worst of people's ideologies since all infrastructure has collapsed and the only thing worth any salt during a war is weapons, defense and intelligence. they already possessed these before the war but now that everything has gone to stuff they have more freedom to operate. if ukraine is forming alliance with neo-national socialist groups like azov, its out of pure necessity as they need all the soldiers, volunteers, mercenaries and conscripts they can get their hands on.
while azov and other groups have put out a lot of their own propaganda since the war started, its important to note that they have been reported to have very small numbers, between 900-2500 active soldiers. their social media and PR definitely gives the illusion that they are more significant in size, similar to cartels like CIA or CJNG. their influence over the conflict has been small but well-documented