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For some time Azov has been problematic for Ukraine and I'm sure privately a lot of their allies are puzzled as to why they don't deal with it. The official line that they "only" have 10-20% of their members that are neo-nazi isn't helping and whilst I understand having a motivated volunteer regiment to help in Donbas was a big deal (even more so now), sooner or later it's going to harm them internationally.
Ukraine is a long way from Nato membership, especially with the likes of the Azov battalion being incorporated into the army.
https://en.m.wikipedia.org/wiki/Azov_Battalion