What is Operation Mockingbird?
First, when we look at the people involved we see signs of QAnon. The WWGiWGA tag is a QAnon tag.
OK, so there we go. Let's look up the Church committee.
A lot of times disinformation and conspiracy theory will pull in reall elements. This post below, for instance, references Operation Mockingbird, and includes a hashtag "ShutdownOperationMockingbird".