The old "why would a perfect God create a world filled with suffering?" argument.
No not a perfect God, an all-powerful AND all-loving God.
We can only judge an entity according to our own perceptions and standards of life. We deem Hitler and Pol Pott and perhaps Putin now as wicked dictators who would kill millions at will and cause immense suffering. Under human standards of living and societal cohesion we do not worship such people. We do not consider them loving individuals. Yet people can clearly be hoodwinked to worship and love another entity who equally kills millions of people, causes or permits immense suffering and engages in all manner of atrocities.
Whether there exist other lives, dimensions is pretty irrelevant when we are currently trapped in this existence. We must deal with the life we find ourselves in at this point and all the evidence suggests that there is no all-powerful all-loving God.
There might be an all-powerful God, but he can not be all-loving going by the heinous acts he has done in the past and the evils he permits to occur in this existence.
There may be an all-loving God, but he can not be all-powerful again going by the evils he perpetrates and permits to happen
There is a deeper question: why would a perfect God create a universe at all?
Because such an entity would be bored to tears and probably made it as a kind of fish tank to watch for amusement not caring at all about the suffering of the countless lives within it. That's the all-powerful but NOT all-loving entity.
What atrocities? What does any of this mean, in the context of eternity? The same rain falls on the wicked and the just, and it is by what comes forth from this rain that men are judged. Pain and suffering are just illusions, and the obsession with the trivial struggles of this life come from the belief that this life is all there is.
This is a rather glib and loveless attitude. You don't care then that 1000s of innocent children are sexually abused by the likes of Jimmy Savile? In your mind it's nothing. Eternity is bigger and that part of it is insignificant. Thus in turn every horrific act in the history of the universe is insignificant, doesn't matter? Where does such reasoning end?
It would mean it doesn't matter if we kill someone as it's just a part of eternity and presumably the person you killed will just go on in another life? Nothing matters, there are no rules, you can do as you please?
Somehow this doesn't gel with the Christian doctrine and ideology but I concede it's highly likely to be the actual reality. Nothing matters, you can do as you please and those with all the wealth and power know this which is how they achieved that status.