Code Stink and C.ANSWER held rallies and got these traitors on radio spewing racist agitprop against the United States government and the war effort with bogus claims of “war crimes” “observed”. They emboldened the enemy in a time of war and sank morale among the citizenry and troops.
That is treason. Lord Haw Haw was hanged for it and Axis Sally incarcerated.
If you believe it is treason, than you have no reason to support another law banning it. What is your point?