The gap between your car and the one in front belongs to nobody at all, and still, somebody moving into it lands like a break-in.

What the research says

In a placebo-controlled experiment, women with borderline personality disorder saw anger in ambiguous faces faster and with stronger amygdala responses than others, and oxytocin reduced that sensitivity. An unclear signal gets read as hostile very quickly, and how quickly varies from person to person. It was a small study in one group, so treat it as a demonstration of the process rather than a measure of how common it is.

Strength of evidence: one line of research. A single study, or a theoretical account.