The idea that there is an entity that creates a world in the full knowledge of the result that there will be humans tortured for all eternity is so monstrous and below even the lowest human standards of acceptability (and, btw., beyond their wildest power of imagination, as well), that it´s impossible that humans have invented this idea.
Since there are humans who hold this idea but cannot have invented it themselves leaves no other conclusion that such an entity must objectively exist.

Since there are humans who hold this idea but cannot have invented it themselves leaves no other conclusion that such an entity must objectively exist.

