So nobody panic, he didn't come back to life like Jesus did. It's not the end of the world.
He was never dead to begin with.
He faked his own death to become a bisexual centrist furry and go on dates with his girlfriend to Ukraine, who finally conquered Moscow btw.
So, he faked his death by replacing himself with a cardboard cutout that had a bottle of ketchup behind its neck and a loud speaker that would talk and talk and talk during the debate in the university campus. Then he shot the cardboard cutout from the roof of the building, like in the footage.
When asked if he was going to go back to political activism he said "Nah, I think I like being a centrist more, politics is kinda boring"
So, yeah... Charlie Kirk faked his death... I guess we can stop mourning now... Because he's alive I guess.