Malice, stupidity, and information asymmetry
Says Hanlon's Razor principle:
Never attribute to malice that which can be adequately explained by stupidity.
Spurred by my recent thoughts on information symmetry, my mind was quick to follow it up with "... and never attribute to stupidity what can be explained by information asymmetry". What I refer to as information asymmetry may be as simple as differential visibility while on road or might be manifested subtly in international relations.
When I was searching for links to cite, I came across this site, which has a more elegant formulation by M. L. Plano.
Never attribute to malice what can be explained by stupidity. Don't assign to stupidity what might be due to ignorance. And try not to assume your opponent is the ignorant one -- until you can show it isn't you.
Sigh! Someone always does it before you, and better.