" Although these domains appear to be remote from each other, the themes underlying anger and hatred in close relationships appear to be similar to those manifested by antagonistic groups and nations. The overreactions of friends, associates, and marital partners to presumed wrongs and offenses are paralleled by the hostile responses of people in confrontation with members of different religious, ethnic, or racial groups. "

― Aaron T. Beck , Prisoners of Hate: The Cognitive Basis of Anger, Hostility, and Violence