Soon after Elon Musk took control of Twitter, now called X, the platform faced a massive problem: Advertisers were fleeing. But that, the company alleges, was someone else’s fault. On Thursday that argument went before a federal judge, who seemed skeptical of the company's allegations that a nonprofit’s research tracking hate speech on X had compromised user security, and that the group was responsible for the platform’s loss of advertisers.The dispute began in July when X filed suit against the...