Some people read an accidental bump as a deliberate attack, every time

Psychologist Kenneth Dodge showed children an ambiguous scenario, like another child knocking over their blocks, with no clue whether it was accidental or deliberate. Aggressive children consistently assumed hostile intent and said they'd retaliate, while non-aggressive children were far more likely to assume it was an accident. This hostile attribution bias helps explain why some people seem to perceive threats everywhere: they're interpreting the same ambiguous events more hostilely.

— Kenneth A. Dodge, Social Cognition and Children's Aggressive Behavior — Child Development, 1980