Let's remember, most of these people had the disposable time and income to travel via airline during a global pandemic to go start a ruckus.
These people aren't genuinely aggrieved. They aren't facing major economic hardships or instability or oppression. In essence, they have no skin in the game beyond the fact that they don't like that their guy lost. They're used to expecting the world to bow to them, and this is what they do when they don't get what they want. Throw a deadly tantrum like a bunch of toddlers with guns. A veritable armed insurrection of "I want to speak with your manager" while brandishing an expired coupon... and also a gun, and kicking down said manager's door while holding the gun to the cashier's head.
These are fairly privileged people. Economically, demographically, you name it. So I can't bring myself to be totally surprised that they thought they'd just sort of "get away with it" either by merit of thinking their idiotic traitorous plan would work, (I don't think many of them thought that would happen, and were primarily there to cause a violent scene in protest) or that it would all come to not and that they, in their privileged world where they generally get what they want and face no real hardships in life, would just kind of be let off the hook by the FBI who would just say "oh you right-wing terrorists, always up to shenanigans! Get out of here, you crazy kids!"
It's the same thing as the Bundys seizing federal property with guns and having a standoff with federal officers because Bundy disagreed with federal law, with most of the offenders simply being let off the hook despite endangering numerous lives. It's a precedent that needs to change, and I hope as many of these traitors as can be caught live a non-trivial amount of the rest of their lives in jail.