Seems to be something of a tactic these days. I wasn't quite sure about Edward R. Murrow, until the local "progessives" started campaigning to name a new high school after him. As a result, I'm now certain he was a closet red.
You'd probably enjoy reading Red Star over Hollywood. I'll let you know how The ACLU vs. America is. I just got it for Christmas. Should be good and raise my blood pressure a couple of points.