And he'd only taken out the mace because he was threatened by another guy, who was trying to provoke him. An agitator was in his face shoving at him and an older man, yelling "shoot me, shoot me, mace me, mace me" at the man who was shot seconds later. The victim disengages, and then it seems the shooter lunges for his mace can which, as you say, was not being brandished. Victim slaps the shooter away, and takes three or so steps back. The shooter draws his weapon while someone apparently tells him to put it back. The victim is still retreating, and then both fire on each other while the victim continues to retreat.

People are trying to make it out like this big bad militia guy was angry and aggressive, but in the span of a minute he was trying to walk away from two different violent confrontations seemingly started by other people against him.