Is It Actually Possible To Extinct A Kardashev Scale II Civilization?

[Vmedvil2]

So I was playing Endless Space 2 and I was able to extinct the Unfallen Civilization that was a Kardashev Scale 2 civilization at Turn 268 by using my fleet of 3 planet destroying Carriers using the "Core Cracker" weapon. I was wondering is it actually possible to extinct a many planet civilization around dozens of stars in real life or is this just fantasy put forward by Endless Space 2's mechanics?

 

Turn 218, my Civilization Blowing up a colony of the Unfallen.

Turn 218, A Warning from my Allies

Turn 268, The Extinction of the Unfallen being a Kardashev Scale 2 Civilization

Edited June 21, 2021 by VictorMedvil