Azov
The
Azov military unit itself doesn't filter their recruits by ideology and many of them simply join to fight the Russians without necessarily sharing the beliefs of their rightist members. In fact, I have read about at least one leftist from the Arsenal Kyiv fan scene who served there in the beginning of the Russo-Ukrainian war sometime in 2014 or '15. In addition, it has since been incorporated into the National Guard of Ukraine (partly to reign in their rightists) and is thus subject to conscription, meaning that as a Ukrainian eligible for compulsory military service, you can end up there even if you wouldn't join of your own accord.
Thus, service in the Azov military unit doesn't make the individual in question a rightist by default, so I wouldn't make that conclusion about Kagal either without further information. The broader so-called
'Azov movement' (mainly the 'National Corps' party and affiliated organizations) is a different story altogether. Of course, this subtle differentiation doesn't make for good clickbait and doesn't net you the applause of False Leftists and Duginists (many of them of course Jews, such as Max Blumenthal), so don't expect mainstream journos to catch on to it.