Later, he boasted of spending the next year “travelling around from major city to major city, just setting up these cells”
Iirc a few mass shooter manifestos also claim this sort of behaviour. So without more facts backing this up it might just be fight club cosplaying. (And yes setting up these kinds of paramilitary fight clubs is very fascist (and quite cringe and weird with the hitting each other, just go to a metal/punk mosh pit))