Dahmer (2002)

Other mistake: Jeffrey gets pulled over by a cop. He shows his license to the cop and the date of birth is the late 1990s, but he was a young boy in the 70s.

Jeffrey Dahmer: You know what the cross was, don't you?
Rodney: Yeah, where Jesus died, right?
Jeffrey Dahmer: A torture device... used to kill criminals. So when you pray to it, it's like praying to an electric chair, or a guillotine.