noun
dislike of people similar to oneself
Refers to the psychological tendency to feel aversion toward those who share one's own traits, background, or group; often used in discussions of social dynamics or self-criticism.
同族嫌悪で、同じ業界の人間がどうしても好きになれない。
Because of this dislike of people similar to oneself, I just can't bring myself to like people in the same industry.
彼の批判は同族嫌悪から来ているのかもしれない。
His criticism might stem from a dislike of people similar to himself.
自己嫌悪 means self-hatred or self-loathing, directed at oneself, while 同族嫌悪 is directed at others who are similar to oneself.
Compound of 同族 (same family/tribe/group) and 嫌悪 (disgust/aversion). The exact origin is uncertain, but it likely emerged in modern psychological or sociological contexts to describe in-group aversion.