Supporters of the Confederacy never denied their participation in a rebellion. They supported the rebel cause publicly, ran for its public offices, served in its institutions, wore its uniform into battle. They didn't need to be convicted in a court of law, they proudly confessed to their crimes.

Trump, on the other hand, denies his efforts to overthrow a legitimate elected government. He claims the government is illegitimate and elected by fraud. He has never admitted to insurrection, and has cloaked his actions by misdirection, doubletalk and outright lies. Trump has never admitted to the attempted overthrow of the constitution; instead he has attempted to accuse the government of doing so.

He has committed a crime but denied doing so, he must be formally indicted and convicted of that crime and given the opportunity to defend himself in a public trial. I'm not nit-picking legal arguments here, There must be a trial. Judges and jurors must go on the historical record and accept responsibility for their decision.. If not, the 14th Amendment will become a mere tool for the party in power to remove its political opponents forever. That's what Trump would do, we must not succumb to that temptation, no matter how justified we may feel.