A strong corroboration of both your premise and your conclusion is available from examination of a cold case, the deliberate, many-handed, witting and willing destruction of Sen. Joe McCarthy by the liberal superstructure and their Communist allies.
For which we now have helpfully available -- fatally for their cause, and for their long-running, adamant, faux-indignant polemics -- the Rosetta text of the Venona Papers, which give the Communists and their liberal tools the lie.
Too, liberals have never, ever rushed forward to explain the presence at McCarthy's table of both Roy Cohn and Robert Kennedy.