Sure, they would have risen up, but at the time of Biden’s inauguration, the most enthusiastically violent MAGAs, the worst of the worst, were being actively hunted by the FBI for their crimes on January 6. Most were hiding out, hoping that their family, their neighbors, their coworkers, etc. wouldn’t turn them into the authorities. Some would be dumb enough to fight back, but most would do their beat to stay under the radar.

That leaves the rest, who were basically the B-Team. They didn’t heed the call to Jan 6, so they had some sense of understanding of the consequences of such actions. They would have understood that HitlerPig and his henchmen were being detained for Jan 6 (we didn’t know about the False Elctors or the Classified Documents theft yet), and while they wouldn’t like it, they would know it’s a legit charge. While they might scream a lot, most wouldn’t take up arms. They are cowards, and their bark is always worse than their bite.

As for the rest, the more rabid MAGA animals, they could have been easily mopped up by the authorities. If the local cops won’t help, the FBI or State can step in, deal with the criminals, and then sanction the local cops.

Sure, detaining the MAGA leadership for Sedition would have caused a huge outcry, and almost certainly some violence, but the violence that it will require to reverse them now that they are entrenched in our government will be far, far worse, and cause the deaths and suffering of many, many more.