I'll second that (no pun here). There were lots of communist "front" organizaitons created in decades past by the communists. I believe that some of them were "planned parenthood", "NAACP", the hollywood "writers guild" and I wouldn't doubt if the ACLU were another. There were lots of genunie communist front organizations. Ask David Horowitz.
Stalin and the USSR may no longer control these organizations. But the people who do control them have the same mindset from the communist days. They hate America, and all that that means. And their goal is to tear it apart. And they're still trying to carry out the goal.