We know. Catholic Church was taken over by Communists, Masons, Jєωs ... staring officially in 1958 when they put aside the legitimate pope Siri and installed Roncalli.
Since they have been infiltrating for hundreds of years, they undoubtedly have some representatives well placed in the larger Traditional groups like the SSPX. I doubt they bother with the smaller groups.
So tell us something we don’t already know.