Hey Kashmir. Thanks for asking the question.
My thought: If this life is only the end and not the beginning, then God appears to have little compassion for us. But if this life is only a moment in a long and satisfying and happy life, which only gets better and has no end, then that would be a logical reason to conclude that God (no matter what religion one has) is compassionate.
One example: When my sons were young, I took them to a physician to be vaccinated. I'm sure to them the needles were frightening, the shots were painful and they had good reason to doubt my love. It mattered not to them that I was honest and told them it would hurt for a moment, but it would protect them in the future. They were too young to understand and were living only in the now. My hug didn't lessen their pain. Only time did.
Perhaps a short life living in the now with cancer or some other disease is like that. Maybe there is even a benefit to living with such suffering for a relatively short time. For how can one truly empathize with the suffering of another having never suffered the same? But since this side of life is short, I guess one who suffers should make the most of each opportunity to empathize with other sufferers. What do you think?