Maybe the left and the ACLU won’t be as bothered by this as you think.
WE all know that such a policy will be used against political opponents in the USA, and I’m sure some on the left understand this as well.
I think the intellectual upper hard left might be thinking as you describe, but I’m thinking more about their useful stooges, you know the kind who are influenced by unicorns and rain-bows and green sustainable life-styles who want war no more and no god above, ect yada yada. Without their stooges amongst students,borderline personality disorder female protestors, geeks, 9/11 conspiracy nuts, actors and media folk, the hard left would have no foot soldiers with which to advance their agenda!