With PLUTO/ERIS involved in this MER/MARS-NN square, the triggers of anger and expressions of rage/violence are merely an unconscious attempt to act-out, or re-enact our unhealed trauma via others in our world.

Pugnacious Mars rules over the pricked-up and scorned SUN/VENUS/CHIRON and ERIS lot in Aries, where it has dawned on some people that eventually everybody, inadvertently, at some point betrays somebody else.

..when Mars passes over the North Node (Saturday) all hell busts loose, as if to settle the score for any past misconduct and abuses.