Domestic (and foreign) Communists had a vested interest in convincing ordinary Americans that they had nothing to do with the murder of JFK.
Don’t “follow the money.”
(Partially because nobody actually said that during Watergate, btw. It has no sound pedigree as political, Machiavellian wisdom, and as much credible real-world utility as “Keep your friends close…” We might as well “do” politics by quoting Animal House or Ghostbusters dialogue. Frankly, that might even be smarter.)
And don’t ask “who benefits?” — unless you ask it the right way: