Why Napoleon Complex is a derogatory social stereotype?

Napoleon Complex is characterised by aggressive social behaviour as an implication of a person's physical or social shortcomings.

It is named after Napoleon, the great French emperor who is known to have compensated for his lack of height by seeking power through conquest.

First, this is an unfair characterisation of Napoleon. The view was fostered by the British as part of propaganda to diminish their enemy's public imagery. There are conflicting accounts of Napoleon being 5 feet 2 inches tall or 5 feet 7 inches.

A 2007 study by the University of Central Lancashire concluded that short men are less likely to lose their temper than men of average height.

This is because when people see a short man being aggressive, they are likely to think it is due to his size, simply because it grabs their attention by virtue of a shorter man's unlikely association with an aggressive nature. This, by no means, shows that aggression is there to compensate for the shortcomings of physiological attributes.