Maybe Elon Musk isn’t the “free speech maximalist” he’s claimed to be. Maybe he’s worried that the perpetually cash-strapped Twitter could keep losing advertisers under his watch. Maybe the European Union’s threats got to him. Whatever it actually was, something led Twitter’s new owner on Thursday evening to take an action so far unprecedented in his monthlong reign: booting off a prominent far-right figure he had welcomed back to the platform merely a couple of weeks ago. Advertisement Even by the already-shocking standards of Kanye “Ye” West’s actions this year—against Jewish Americans and ex-wife Kim Kardashian, among others—the most recent...