How can you even compare these two?
The concept of Karma is not the same as the juctice of Allah. So all the bloodsucking billionares who benefit from the misery of others and get richer and richer and nothing “bad” happens to them in this lifetime will get justice in the next life, the afterlife. That’s the justice of Allah.
How do you juctify the suffering of little children? Do they deserve it because of Karma? What about the raping and killing of little innocent children? What wrong have they done? According to Karma they deserve it because of certain things they have done in their previous life. That’s Karma. LOL
So once again, why are you using the justice of Allah as a synonym for Karma?