I can’t speak to the Salem Witch Trials, etc., but retired head of the FBI Ted Gunderson specifically speaks to evidence he found proving the veracity of the claims of the children in the McMartin case. The video is long and filled with eye-opening evidence that he details, for any who have the time to listen.
https://www.youtube.com/watch?v=BplUD6kQYuU
Here is the name of the video:
Retired HEAD OF FBI Tells ALL “Illuminati, Satanism, Pedophile Rings”
https://www.youtube.com/watch?v=BplUD6kQYuU
Ted Gunderson was never head of the FBI. He is a total weirdo who makes expensive speeches telling any fool who will listen that McMartin was real.
If you even want to know if McMartin was real, watch the entire videos of the kids being interviewed, how they were coached to lie, how they said the abuse happened in Las Vegas, how they met with Elvis, rode in Space Ships, etc.