Most cases of suffering are our OWN atrocities--human against human--and as such do not allow us to shift the blame from ourselves to God. This is not an abstract...
question for Him. His Son suffered innocently at the Cross, experiencing both the rejection/hatred of the world, PLUS the penalty for evil that was due to you and I...
He has experienced this firsthand, and with the depth of spirit and sensitivity that only an infinite Person can feel...
Does this seem like a reasonably possible explanation to you?
If the person asks where's the proof for God/Jesus/Christianity, go here.