Let's put something into perspective here: Elon Musk has 179 million followers on Twitter. Million. According to the Census Bureau, the population of the United States of America is something like 340 million. Obviously, all his followers aren't American, but that's not the point. The point is that he has the equivalent of half the population of the entire United States of America getting updates every time he tweets.

So while he has the legal right to say whatever the hell he wants, he has the moral and ethical obligation to wield that power responsibly. When he retweets a conspiracy theory and lends it his support, and that conspiracy theory results in a man's family fleeing their home because they aren't safe to remain there, he bears a significant measure of responsibility for it.

To take things a step further, when a figure with as much abstract power as Elon or JKR, or as much concrete power as the President of the United States, promotes conspiracies about queer people; when they tell the world that queer people are a threat to their children and their country, and then a maniac with a gun murders six people in a gay nightclub, that figure is not innocent. They might not have literal blood on their hands, but they sure as hell have blood on their soul.