Finland has a large conscription army. Since most Finnish men are trained reserve troops, presumably most of those neo-Nazis are as well. If Russia attacked, they’d get called into service like everybody else unless they have a criminal record that prevents it.

And then online posters would be using this is as proof that Russia has a point with the “denazification” tales they use to justify aggression on other countries’ sovereign territory. “Well, you have to ask why the Finnish army invites Nazis, and now NATO is supplying arms to them too. Just asking questions here that media doesn’t. I am very smart.”