“Lunatic fringe” (1913) was popularized and apparently coined by U.S. politician Theodore Roosevelt.

“Then, among the wise and high-minded people who in self-respecting and genuine fashion strive earnestly for peace, there are foolish fanatics always to be found in such a movement and always discrediting it — the men who form the lunatic fringe in all reform movements.” - Theodore Roosevelt, autobiography, 1913

we call them “shitcoiners” today 😆