All you're doing is printing the legend instead of the facts, which Evans in his book goes over with a fine-tooth comb. First off, the silly notion that McCarthy was running roughshod until along came Edward R. Murrow and Joseph Welch isn't what you'll learn if you go back and read the historical record. On a routine basis, McCarthy's political enemies dished out as much dirt as they could in return, chief among them political gossip columnist Drew Pearson (who back in the 1940s employed as his two chief leg men for political gossip, men whose names in the 1990s turned up in the Venona Papers as active Communist party operatives) so this image of no one standing up to McCarthy until then is just another myth in need of genuine revisionism. And second, you know what prompted that grandstanding "Have you no sense of decency?" moment by Welch? It was when McCarthy simply asked a question about one of Welch's lawyers by repeating something that had been written *one month earlier* in the New York Times (no McCarthy supporting newspaper that was). And yet Welch had never seen fit for a whole month to feel any indignation over the New York Times not having any sense of decency in running the story that all McCarthy did was repeat verbatim without any embellishment, instead falsely suggesting that McCarthy had concocted this accusation out of thin air because of his "cruelty". The only thing Welch knew how to do better than McCarthy was to play to the TV cameras, which McCarthy didn't know the first thing about which combined with his boozing was his biggest enemy (and I'll be the first to acknowledge the whole Army investigation was ill-considered; he was by then taking too much advice from Roy Cohn).
And just whose lives were ruined by McCarthy? Let's leave out the Hollywood blacklist for a moment because he had nothing, nada, zippo to do with that (but then again those people are not heroes, especially not the Hollywood Ten Stalnists whose regard for the Constitution was non-existent). My heart does not bleed for the likes of Owen Lattimore or John Stewart Service, two men who put admiration for Mao Tse-Tung ahead of the interests of the United States and our ally, the Nationalist Chinese and of whom in Lattimore's case, there is still reason to believe he was working as a Soviet operative. Nor do I have much regard for those who covered up the inconvenient facts surrounding nearly 500 Soviet operatives inside the Roosevelt Administration and exercising a dangerous influence on key policy matters from Alger Hiss to Harry Dexter White to Laurence Duggan to Lauchlin Currie and a host of others who once exposed, the Truman Administration simply quietly moved them out instead of having a public housecleaning, which had Truman done so, he could have prevented HUAC and later McCarthy from becoming big public figures using the issue in the first place (indeed, one of Truman's most shameful moments was when he attempted to get a Justice Department indictment not of Alger Hiss, but Whittaker Chambers, the man who exposed Hiss before HUAC. Only the efforts of HUAC caused that attempt to railroad a genuine American hero to fail). The presence of all those spies is the greater outrage than anything that happened in the investigations afterwards and how the public was denied its full right to know about how extensive that was since the Truman Administration also made the decision to keep the Venona dispatches classified when public exposure would have revealed that threats of communist subversion was not a "red herring".
As for "no one is arguing that America is evil" that is not true in the case of Oliver Stone. He firmly believes that since the end of World War II, America was evil to challenge Soviet hegemony and aggression, and that every aspect of American foreign policy on behalf of challenging Soviet backed communism was evil and that JFK (a Cold Warrior in the traditional sense who once counted McCarthy as a personal friend, as did Bobby who made McCarthy godfather of his first child) was somehow done in by some evil conspiracy to keep us in Vietnam (never mind that JFK was the one who personally ordered the overthrow of South Vietnamese President Diem just three weeks before his own death because he felt that Diem wasn't tough enough), even to the point where Stone in his movie chose to rehabilitate a genuine case of a man who ruined lives with demagoguery in the form of Jim Garrison (take a look at what Garrison did to Clay Shaw, and you will find something that vastly exceeds the worst thing McCarthy could be accused of because Garrison as a prosecutor held powers in ways McCarthy never did and never could exercise influence over. This including suborning perjured testimony and falsifying evidence in courtroom proceedings. Yet Oliver Stone takes the view that even if he did Clay Shaw an injustice with his movie, that pales before what he considers the "greater good" of exposing this evil conspiracy he says exists)
BTW, if you're so concerned about what you regard as "black marks on American history" then where do you stand on Abraham Lincoln during the Civil War suspending habaes corpus, imprisoning suspected Confederate supporters without trial etc.? History long ago learned not to regard that as a "black mark" in evaluating Lincoln as the wartime leader who saved the Union because they learned how to develop a sense of perspective, even though I would find it a safe assumption we had more "ruined lives" who were caught up in the sweep in that endeavor than there were blacklisted actors and writers in the 1950s. And then there's the fact of how when Franklin D. Roosevelt is evaluated as a wartime leader, is the first thing we mention the internment of Japanese-Americans? No. It seems that with FDR, we learned to have "perspective" as well. The same thing is needed with McCarthy, not for the sake of turning him into a hero but for the sake of putting an end to this myth of him as some demon who controlled America in fear until along came Murrow and Welch to save the Republic. That is pure fantasy, and in light of how too many of his opponents turned out to be dangerously wrong about the extent of Soviet espionage in this countr and how most of the "victims" were not pure as the driven snow individuals, the picture of the McCarthy era becomes one where less self-flagellation is called for and more evenhanded perspective.