rebellion, revolution, uprising, revolt, insurrection, mutiny mean an outbreak against authority.The Jan. 6 protesters were not armed, and not formidable. They did not topple a government or anything like that.
rebellion implies an open formidable resistance that is often unsuccessful.
open rebellion against the officers
revolution applies to a successful rebellion resulting in a major change (as in government).
a political revolution that toppled the monarchy
uprising implies a brief, limited, and often immediately ineffective rebellion.
quickly put down the uprising
revolt and insurrection imply an armed uprising that quickly fails or succeeds.
a revolt by the Young Turks that surprised party leaders
an insurrection of oppressed laborers
mutiny applies to group insubordination or insurrection especially against naval authority. a mutiny led by the ship's cook
I would not even call it an "ineffective rebellion". I don't think that anyone thought that they would gain political power by walking into the Capitol building.
They wanted to make their voices heard. They certainly got everyone's attention. Possibly some wanted to delay a vote for a few hours. If so, they succeeded.
I would just call it a protest. It was a pro-democracy protest, as all they wanted was a free and fair election.
The biggest slogan of the Biden inaugural was "Without unity there is no peace." What does he mean by this?
He supports impeaching Trump, and kicking him off Twitter and Facebook. The impeachment is primarily for expressing an opinion about the fairness of the election. I think it is clear that by "unity", Biden means silencing and deprogramming his adversaries.
When the Republicans were in power, they made no effort to censor their adversaries. It was understood that in a pluralistic society, people can have different opinions. Now the Left is trying to force the same views on everyone. They are doing it everywhere, from the White House on down.