"Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity." ― Martin Luther King Jr.
I can't help but think of my favorite quote from This Is Spinal Tap when I read MLK Jr.'s words above.
David St. Hubbins: It's such a fine line between stupid, and uh...
Nigel Tufnel: Clever.
David St. Hubbins: Yeah, and clever.
I am pretty sure that Rob Reiner was not thinking of MLK, Jr. when he wrote this script, but you never know!