The studio still made the choice to blacklist the Communists. The government did not force anything except the truth out of these creeps.
And why not blacklist? Why should the studio head be forced to pay those who want to rob him at best and probably want to kill him?
Unlike, say, in the Soviet Union, where such dissent would have been punished quite a bit more harshley than that.
They chose to join or associate with anti-American groups and parties who advocated the overthrow of the U.S. government. Yet, they lost ALL courage of their convictions when simply asked about it. Then, they cried boo-hoo for decades when their CHOICES came around to bite them (if only for a few years, after which they were lionized as "heros" by their fellow-travelers).
They had to do honest work for a few years, after their CHOICES made them unemployable in their industry. This is laughably insignifigant next to their ideology's nearly century-long stream of blood and misery. A stream which, by their actions, they helped along.
Put your sympathy where it belongs...with the REAL victims, those 100 million dead souls murdered by the unspeakable horrors of Communism.