If you were on the verge of becoming the first trillionaire in human history, with the press breathlessly reporting on your every move, that would probably be your focus. Yet in the days before SpaceX’s initial public offering vaulted Musk into the 13-digit wealth club, the tech mogul’s mind was elsewhere—a white man in Belfast had been viciously stabbed by a Sudanese immigrant, and it provided Musk an opening. In numerous social media postings , Musk highlighted the crime in starkly racist