FBI files on Disney mentioned several times about how helpful Disney was. He was SAC (Special Agent in Charge) contact for the FBI and the intelligence community. This was all before he produced FBI documentaries of his show.
This is most likely due to Disney production of propaganda pieces for government agencies.
He was involved heavily with the MPA which especially deals with issues involving Communism in Hollywood.
The FBI files also show in 1961 by the FBI ask him to produce a few cartoon shorts for the Child Molester Program. The shorts were created to inform children what to do when approached by a stranger.
The full fbi files can be seen here.