It’s all pretty straightforward, according to the new management. In a statement announcing his $44 billion deal to purchase Twitter, pending owner Elon Musk wrote in a statement that the company’s core policies would remain the same: “Free speech is the bedrock of a functioning democracy, and Twitter is the digital town square where matters vital to the future of humanity are debated.” But in direct messages and town hall comments on Monday, the people who make Twitter tick were more concerned with debating the future of their employment — concerned that the world’s richest man would not have their...