The Jan. 6 committee has woven through each of its public hearings the voices of actual rioters from that day, seeking to draw a direct tie between the violence at the Capitol and what was happening behind the scenes at the White House. But the rioters themselves haven’t been circumspect about what made them travel — in some cases hundreds of miles — to Washington, D.C., for a rally that day and then march on the Capitol, which hundreds of them entered.