It's a bit more complicated than that. The people's power party has supported Yoon much like the Republicans have supported trump, this was just the straw that broke the camels back.
If the parliament didn't immediately deal with the situation, there would have been a massive riot. Koreans have a pretty long history of rioting against the government, and even the extremist among the right wing politicians didn't want to catch that smoke.
The biggest difference between the US and Korea is that the US police state is filled with conservatives who yearn to do violence against their fellow citizens. While the Korean police state is mostly made of everyday normal people who are just doing their mandatory service.
There was a moment last night where the military could have stepped in and enforced the president's will, but chose not to. I think if it had been America, the woman who grabbed a soldier's rifle pointed at her head and scolded the dude, would have been killed or at very least beaten severely.
That leaves out how public opinion changed after motive was known.
The assassination brought the many social issues with the Unification Church under the spotlight again, as well as tumbled the approval of the ruling party. Under the public pressure, the responsible ministry decided to file a dissolution order against the UC with the Tokyo District Court on 13 October 2023, after nearly a year of investigation of wrongdoings
Japanese people cosplaying Yamagami's appearance during Abe's assassination were spotted at events like the rally against Abe's state funeral. These cosplayers held cardboard signs displaying the leaders they were against: Abe, Ali Khamenei, Vladimir Putin and Xi Jinping
Right now there are a bunch of supreme cout justices who have lied to the public and reversed some laws, stripping away the rights of vulnerable demographics, resulting not just in a body count, but some particularly ghastly preventable deaths.
The story goes on with Texas changing its investigation and reporting policies so that these gruesome deaths can go without public scrutiny or outcry.
I am not a militant activist, and in most cases do not condone assassination, including the attempt on Trump. But if the lifetime appointments of supreme court justices were to suddenly become a liability, say if any of the FedSoc jurists were shot at, I would certainly enjoy the poetry.
It's actually Leonard Leo and his dark money benefactors that deserve a proper Disney eaten-by-hyenas demise, and so much damage has been done that the imbalance of justice will be felt for centuries.
So even for peaceniks like me, there are exceptions to civilized process.
It seems like the rest of the party didn't have faith in him. He jumped the gun for personal reasons, while it would have cost the judiciary and politicians more than it would benefit.
This is kinda what happened when Trump lost the 2020 election. AG Bill Barr was probably down with a dictatorship, but he also knew that Trump wasn't gonna pull it off then. If Trump tried to overturn that election, the military would have stopped him and the public perception would sour. By holding Trump back from a more radical conflict that might actually bar him from running again, Trump was able to come back for the same reasons that he won in 2016.
If President Moon gets removed, the opposition party might come into greater conflict with Trump because they're less enthusiastic about licking America's boot. Trump will likely stop protecting them against North Korea unless they agree to unreasonable demands, as he tries to avoid such defense obligations. He might leave no matter what, but Moon will probably return to power anyways in 2026 on a platform of getting support from America.
He needs to be barred from holding office, or South Korea will be the next liberal democracy to fail from inside.
In all the cyberpunk I've read/seen the state is usually quite weak, and that's a pretty important aspect. Martial law is not compatible with a weak state. That's a different type of dystopia