I'm working on compiling a list of 'CrAzY conspiracy theories that turned out to be true.' Here's what I got so far. (please comment if you have any additions.)
Big oil climate data
cigarettes and cancer
Hunter Biden laptop
Steele dossier
USS Maine
tainted polio vaccine...
Gulf War Syndrome
Agent Orange
Bay of Pigs and anti Castro
Crack in inner cities
Poisoning alcohol during prohibition.
MKULTRA
Fast and furious
wide receiver
bias algorithms on social media
operation STINGRAY
testing mustard gas on US sailors
Tuskegee syphilis experiment
Gulf Of Tonkin
operation northwoods
sand creek massacre
wounded knee massacre
the trail of tears
Japanese internment
McCarthyism
Jim crow laws
Kent state massacre
the patriot act
testing radioactive elements on US citizens
operation paperclip
Phoebus Cartel
The downwind people
Premptive intel on Pearl Harbor attack
NSA mass surveillance (Ed Snowden)
Bio labs in Ukraine
Weather Underground
(And my personal favorite,) "turning the friggin frogs gay!"