*In the 19th century, civil wars tore apart the US, Mexico and Argentina. Then came democracy’s fight against reaction.*
That is called “reconstruction.”

In several countries, liberal governments got tired of putting down
right-wing rebellions, and ultimately gave amnesties to the reels; those did not settle down, but continued to rebel and sometimes eventually won. This suggests that the US needs to crush the trumpery movement to ensure it cannot keep rebelling. No amnesty.