The president-elect and his allies have spent four years reinventing the Capitol attack — spreading conspiracy theories and weaving a tale of martyrdom to their ultimate political gain. In two weeks, Donald J. Trump is to emerge from an arched portal of the United States Capitol to once again take the presidential oath of office. As the Inauguration Day ritual conveying the peaceful transfer of power unfolds, he will stand where the worst of the mayhem of Jan. 6, 2021, took place, largely in his name. Directly behind Mr. Trump will be the metal-and-glass doors where protesters, inflamed by his...