Step one: live in a country the size of Kentucky with the population of Texas + Florida, half of whom live in the capital's metro region while the other half live within half-a-day's drive.
The US's geography makes comparisons with successful protests in much smaller countries basically moot.
Korean president has very low approve rating and is quite unsophisticated in political operation. The martial law drama was widely considered stupid move by the president.
Trump II on the other hand is much more experienced and thoughtful in executing his playbook. America has a lower chance coming back from authoritarian, and the sacrifice needed to pull this off will be vast.
South Koreans had direct, lived experience with authoritarianism and thus don't want to go back to it. The US is yet to experience it in order to learn the lesson. People generally tend to learn only after experience.
I guarantee the Trump administration and Project 2025 authors are doing an in depth review of this coup so they can learn how to do it even better and not make the same mistakes. “Let’s see…protesters used social media to organize. We should be sure to blackout social media when martial law is prepared. Hey Elon, Zuck, can you guys help us out?” Etc.
This article gives Trump a playbook for exactly how to squash a rebellion. If we want to fight, we have to be prepared that they will have learned from South Korea and adapted.