The greatest danger of bombs is in the explosion of stupidity that they provoke.
Octave Mirbeau
My heart is broken in the face of the stupidity of my species.
Joni Mitchell
Stubborn and ardent clinging to one's opinion is the best proof of stupidity.
Michel de Montaigne
Whoever looks at America will see: the ship is powered by stupidity, corruption, or prejudice.
Johann Most