Anti-1st Amendment Group Attempts to Violate Bishop's Civil Rights

Can the Americans United for Separation of Church and State be sued for attempting to violate the Roman Catholic bishop of Paterson, N.J., Arthur Serratelli's basic civil rights in trying to violate his freedom o f speech? I think they should. If they want to criticize him, that's fine. But anyone who tries to shut someone up for giving their opinion through the use of government should be imprisoned for attempting to violate that person's basic civil rights. Seriously, people, pay attention to this. Do we really want someone in office who uses these tactics, whether directly or indirectly, to silence his critics?