That's kind of the way I see it. The kids had the same right to self-defense that he did.
If seeing a gun in another vehicle makes you feel threatened, then seeing Dunn reach for his weapon and load it would do the same. If they had had a gun wouldn't they have the right to use it given his actions??? and yet they drove away.
If Dunn tries the self-defense defense it will be a mockery of those who do use their weapons for self defense.
I'll add that idiots like Dunn who fly off at the handle and think anything is justification to shoot someone, threatens gun rights everywhere.