Q: "Russian Neo-Nazi Skinheads..."
A: covertly financed by jWestern zio-fascist banking elite (as usual: to polarize society, destabilize Russia, and use unaware "skinheads" as a cannon fodder)
Q: "... vs Russian Mafia?"
A: Russian speaking Jews and Kavkazians, some of whom are also supported by jWestern zio-fascist banking elite?
Well... surreal scenario of course, but who knows what comes to heads of that "banking elite" next, right?
In the 1930's not a lot of people thought that Russians and Germans are going to kill each other in millions... actions of both were covertly orchestrated by the "banking elite".
So, the one who came up with ideas and knows how to manipulate (remote control via education, media etc / unstructured control) sheeple will win. Battles. But not real wars. Wars are winning those, who have control over their brain, thoughts and emotions - these people won't follow any "-ism", any cult (incl hyper-trophic consumerism, which is a disease of mafias, oligarchy and so on), any imposed pseudo-culture.
~ The Greatest Victory Is A Victory Over Yourself ~
and if you follow some imposed cult or "-ism" you're not in control over yourself, you are a slave, or a zombie, because you allow those, who invent(ed) that cult/"-ism", to use you as a part of the system, THEIR system. They in turn are slaves of their own worthlessness, which they desperately try to compensate with megalomania... without realizing that it won't lead them and their offspring to a naturally perfect balance/harmony.
The leader of the Neo-Nazis just found out he was Jewish so they're out and the leader of the Mafia just found out his mum had an affair with the Neo-Nazi leader, so he's now sleeping it off. So, I guess no one wins in this situation.
Unicorns.
Batman will win
No possible winners there. All losers.
If zero multiply by zero, then there will be zero in result.