This is so true, too often we come to quick first impression judgements based on nothing more than a personal projection of intent. Nowhere is this more obvious than in driving... Not everyone is out to cut you off or do something annoying, sometimes it really is just a mistake or misunderstanding.
And if it is that easy to succumb to quick judgement in such a mundane situation, it is even easier in complex situations to jump to a knee jerk reaction...,
boom!