From the recent ERADICATING ANTI-CHRISTIAN BIAS executive order:

Does anyone know what this part of the recent executive order is alluding to?

"Then, in 2023, a Federal Bureau of Investigation (FBI) memorandum asserted that “radical-traditionalist” Catholics were domestic-terrorism threats and suggested infiltrating Catholic churches as “threat mitigation.” This later-retracted FBI memorandum cited as support evidence propaganda from highly partisan sources."