The President of the United States supported it. There's evidence that the National Guard specifically wasn't deployed in order to increase the danger to the legislature.
It was a loosely coordinated effort. Either by sympathy or by design. The individuals involved are being found. The real perpetrators are completely let off the hook. It’s just a game of chess and a King’s Castle move didn’t work this time.
It was a signifant event and one that is well worth being strongly concerned about. That does not justify spreading hyperbolic FUD. In my view the seriousness of this event makes it more important that we bring our full rationality to bear when discissing it and try our best to avoid obfuscating the problems it revealed with the usual partisan games of BS and distortion.
You'd have a Congress and President both declaring that a free and fair election was a "Steal" and they would have the votes, the military, and the levers of power.
The people rioting weren't going to overthrow the country and take over, they were a useful tool for trump to overthrow the election and install himself as President for 4 more years.