In the 1970's William Friedkin made three absolute classics: The French Connection, The Exorcist and Sorcerer.
Over time The Exorcist has lost none of its terrifying power. When I first saw the film, some of the narrative led me astray. I assumed that the opening scene was shot at the ruins of a city that Alexander the Great or Trajan had built, it wasn't. The opening scene was shot at the ruins of Nineveh, capitol of the Assyrian Empire - the original Evil Empire. I've watched the film twice, that's all I need. When I saw it for the first time the opening scene was censored.
Pazuzu was the Assyrian God of the wind...sort of like Trump.