Yet if a person intentionally provokes a fight as part of a plan to cause death or great bodily harm another person and claim a right of self-defense, he or she forfeits the right to use self-defense because his or her action is premeditated or intentional. Wis.Stat. § 939.48(2)(b).
There's plenty of evidence that the militia in general and the 17yo douche in particular provoked the fight. Particularly since the militia organizer was quoted as saying that the police told them that they would push the protestors to them to "deal with" and the police would leave to let them do it.
Additionally, the prosecution commonly argues that the person claiming self-defense is not entitled to self-defense because his or her behavior was the type of behavior that causes another person to attack and that the attack would not have happened if the other person had not been provoked. Wis.Stat. § 939.48(2)(a). Under this situation, a person forfeits the right to use self-defense unless:
(1) the attack results in the behavior that is the person claiming self-defense reasonably believes is likely to result in death or great bodily harm and the person claiming self-defense does not use “force intended or likely to cause death or bodily harm” to the other person; Wis.Stat. § 939.48(2)(a);
(2) the person claiming self-defense has “exhausted every other reasonable means to escape from or otherwise avoid death or great bodily harm at the hands of his or her assailant;” Wis.Stat. § 939.48(2)(a); or
(3) the person claiming self-defense “in good faith withdraws from the fight and gives adequate notice thereof to his or her assailant.” Wis.Stat. § 939.48(2)(b).
In this case, the 17 yo douche not only antagonized the protestors by pointing his AR at them but after the guy in red tossed the molotov and missed he can no longer say that he believes there was a threat of deadly force and he had a duty to continue to retreat not turn and murder someone who was 5'3" by shooting them in the head.