Who is calling for restricting free speech? I'd be happy with people acknowledging it is happening instead of saying it's "nothing" or "McCarthyism" (see this

Who is calling for restricting free speech? I'd be happy with people acknowledging it is happening instead of saying it's "nothing" or "McCarthyism" (see this thread). It does no good to lie to yourself. Some acknowledgement instead of denial is the first step towards...something.