His anger is primitive, maladaptive, pent up. Anger is a primitive, limbic emotion. Its excitatory components and patterns are shared with sexual excitation and with fear. It is cognition that guides our behaviour, aimed at avoiding harm and aversion or at minimizing them. Our cognition is in charge of attaining certain kinds of mental gratification.
Anger is evoked by aversive treatment, deliberately or unintentionally inflicted.
The angry person and the Personality Disordered both suffer from a cognitive deficit. They are unable to conceptualize, to design effective strategies and to execute them. They dedicate all their attention to the immediate and ignore the future consequences of their actions. Immediate facts and actions are judged more relevant and weighted more heavily than any remote aversive conditions. Anger impairs cognition.