Spiritual Forums - Question about karma

What I don't understand about karma is that to assume everyone who experiences pain and becomes a victim to somebody, that it is either due to past karma or is divinely arranged. I have a strong background in Hinduism and this question has never left me alone. When i think of the Hiroshima bombing it doesn't make sense to me that something like that was divinely arranged, it took out countless ecosystems and countless innocent lives, perhaps many of which were pursuing a path. I don't want to delve to deep too deep into this.

This is the age old question of why do good people get hurt. I'd really like to see a good answer to this.

Thanks, Blessings and Namaste.