Disenshittification
While the other answers are funny, the real answer nowadays is either “murder” or “assassination”. There is not really a more specific word for it.
Regicide is a Latin lego word created at a time when people had long stopped speaking proper Latin. It combines “of the king” with “killer.” It followed an established pattern like fratricide, killer of the brother. Note that we slightly perverted the Latin grammar over time by using these words to speak of the killing rather than the killer.
My Latin is shit. I’m not aware of a snappy expression that encompasses “Head of state or government” so we can add -cide to the end like all political scandals since Watergate get -gate at the end.
Justice
JFK’ed
Just like every scandal is now a [X]-gate
Magnicide, maybe?
Ok but what would it be called if someone killed Trump? MAGAcide? Since he is niether great or important in the bigger picture of the universe.
That’s when you kill them with magnets /s
‘lone gunman’
The name regicide has had millennia to develop, while I think it is likely that this novel method of obfuscating the succession crisis has not had similar time or cause for neologization.
Cathartic
Depending on the subject, I think it would be called catharsis.
Relief.
