I’ve described this scene here before, but I’ll give it another go, set in this rather loony tunes world you have created, OP.
Within days of the Repeal, both protests and “boat accidents” skyrocket. The country becomes almost paralyzed, as the 100 million gun owners in this country suddenly have a very serious, and very real beef with whatever administration may be in control at the time.
There are some incidents, most of them kept pretty low key, until the straw that breaks the camels back.
A federal agent trying to inforce a warrant for search and seizure of illegal goods (firearms) on kindly Old Man Jenkin’s farm. Jenkins, not really up to speed on currently politics, tells the agent to go fuck himself.
Within hours, there has been an “armed standoff” at the old Jenkin’s place. Not willing to be shown pulling a Waco or a Ruby Ridge, the standoff goes on for days, until finally a gung ho agent decides that it’s time to push the button. Agents move into the farm in tactical gear. Jenkins fires, in a panic. The agent is hit. Another agent is hit.
The Jenkins farmhouse is riddled with rounds. Jenkins is still alive and kicking, apparently as there are outgoing rounds as well.
The National Guard is called on to move on the farmhouse with an armored vehicle, and seize Jenkins.
This is the moment. This is where things are balanced on the end of a needle.
Lt. Williams, a local boy who has been horrified by the entire proceedings, refuses his order. He is immediately removed from his role. The next officer, also refuses.
A unit of the National Guard, under lawful orders from their chain of command, are refusing. They cite the Posse Commitatus act, they cite obscure legal factoids, they bray about illegal orders, but in the end, they refuse. They are arrested, as a group, and taken to a local holding facility.
The following day, a large group of citizens march on the facility, peacefully, but with grim signs and a grimmer demeanor. After a few hours of raising tension between the group and guards in riot gear, a shot rings out. Nobody knows who from, nobody knows why, which side, but that shot triggers an onslaught of fire into the group. Dozens are killed, hundreds wounded.
The next group approaches bearing illegal weapons. Guards, either police or military, are ordered to fire on them. Some refuse. Some will do so.
And some walk over, in uniform, weapon in hand, and join those protesting the actions at hand.
Within days, the local militaries have ceased to function as coherent combat units, and more and more servicemembers and their gear turns up missing as things get more out of control.
In the dead of night, a group with no name, storms the facility holding the original military unit. They have military weapons, and appear to be well trained. They take casualties, which they deal with in a professional manner, and extract the prisoners. That event is the Fort Sumter of the 2nd American Civil War.
Far fetched, and a bit fantastical, I know, but no more than the OP.