Yes, while I wasn’t alive under McCarthy I do recall the aftermath. Most surprisingly, was how RFK had tied his boat to those hearings. We can only hope that what you write is correct but with a very passionate resistance that did not suffer defeat like Germans did in World War II, this defeat may be the 1923, failed Beer Hall Putsch moment — we either do what we can to reincorporate most of these Trump fanatics into a normal American society; or, we can suffer the consequences. Most of the fanatics are still potentially productive Americans but a significant minority of them feeling especially vulnerable, will always hate.
I am sorry for shamelessly promoting my essays but here are two that might be of some interest.