Your question about "who McCarthy specifically smeared" should be answered before we speculate further. Who did McCarthy smear? I assume by 'smear' you mean 'falsely accuse'. If he pegged a communist - that was his job.
Was it? Do you propose that all communists are enemies of the people? Is the mere fact that somebody believes in a political religion enough to make them somehow a criminal?
Why, you could say the same thing about atheists. Oh, wait, he did, he said atheists are "commies".
Of course, they aren't, but you seem to conveniently have forgotten that the cry "COMMIE" was nothing more than a way to ruin the life of anyone McCarthy didn't like.
The House Commitee on UnAmerican Activities, originated by Congressman Martin Dies of Texas, is often confused with McCarthy (McCarthy was a US Senator from Wisconsin). The HCUA was active from 1945 into the 70s. I think the Hollywood inquistion was run by HCUA, not by McCarthy. McCarthy was after State Dept and other high ranking US gov officials.
Err, HUAC, you mean?
You say "I think". Now, perhaps, you need to do something.
GO LEARN WHAT REALLY HAPPENED and get back to us.
Hint, the accusation of "commie" was a way to attack anyone who questioned whatever either Senator Joe or HUAC was doing. In fact, the similarity to how people went after anti-war people during 'nam, and how they go after anti-war people now by calling them "unamerican" is, well, more than striking, it's (rule-8ing) close to identical.
What do you mean about McCarthy possibly being "right in a big picture kind of way"? Do we know if he accused anyone that was NOT communist?
Well, let me put it the way that the burden of proof requires. DID HE EVER ACCUSE ANYONE WHO WAS REALLY AN ACTIVE SUBVERSIVE?
Not a "communist", but an active subversive. After all, he claimed that all commies (and fellowtravelers) were subversive after all. Despite the fearmongering of the day, much like the fearmongering of the present regarding other things, precious little evidence has emerged, then or now, that the people he attacked were subversives.
They were atheists, jews, people who belonged to the CPUSA (ok, perhaps such people are a bit, um, foolish, but do you say that about atheists in the present climate where atheists are less trusted than communists or Islamic people?), and mostly people who had the effrontery to stand up to him.
But where's the evidence that they were active subversives trying to make the USA into a communist state?