BlacKkKlansman (2018)

Factual error: In the bar scene there is a sign for Genesee beer. That brand never went west further than Pennsylvania.

McCullagh

Factual error: At the David Duke meeting, a Klansman is told to take an urgent call on the phone and goes outside to take it. The grey telephone is a British 1970's one, not an American one.

superfish

Factual error: There is a modern 3200 Series Fire Department Knox-box near the ending scene on the Colorado Springs Police Department Building. The Knox Key-less entry System has been utilized by firefighters for 40 years, but this one is way ahead of its time.

Kwame Ture: All power to all people.

David Duke: America first.
Klansmen: America first. America first.
Waiter: If I would have known that this was a Klan meeting, I wouldn't have taken this motherfucking gig. Shit.

Flip Zimmerman: For you it's a crusade. For me it's a job.
Ron Stallworth: You're Jewish. They hate you. Doesn't that piss you off? Why are you acting like you don't got skin in the game?