If stupidity is joined by power

"Der Ignorant missachtet die Belehrung.
Und wenn zur Dummheit sich noch Macht gesellt,
scheut er kein Mittel der Zerstörung."

The Ignorant disregards the instruction.
And if his stupidity is even joined by power
he does not shy away from any means of destruction.

Ivan Krylov (13 February 1769 – 21 November 1844)