This article has an interesting, if somewhat implausible, explanation. It was posted on the website of the venerable radical magazine Mother Jones on 3 January. The explanation if offers for the absence of sedition charges is the bald assertion "America does not talk about violent expressions of white supremacy as sedition".
What a strange proposition. What is this thing called "America" that talks, or does not talk, about things, as distinct from the multitude of individuals, factions, parties, ideological tendencies that talk and argue about things?
It then goes on to claim, without evidence, that the only possible motivating factor for the riot was "white supremacy". I would have thought the main motive was a belief by many that the election was stolen, but I guess they would say such belief is itself a manifestation of white supremacy.
Anyway read it for yourself.
Excerpts Read the article Discuss the article View in graph
January 6 defendants came armed with bats and bear spray and stun devices and guns and zip ties, aiming to overthrow the election by any means necessary. They called for the execution of the vice president. They assaulted law enforcement, bludgeoning officers with American flagpoles and police barricades. They stormed the Senate floor, stole mementos, and seized government files. They told us what they were there to do—for weeks ahead of time, in some cases—and they very nearly did it.
But no one has been charged with sedition, because America does not talk about violent expressions of white supremacy as sedition. Even when it manifests as a coup against America itself.
Not every person who stormed the Capitol is enrolled in a white supremacist group, but one does not need to avow white supremacy to be its surrogate. What other ideology imbues a mob with the power to besiege the citadel of American democracy and attempt to usurp an election, all in the name of “patriotism”?