Harm done to them by other people, and justifiably and rationally looking for answers to how/why/what/where/when/who, so they can make the harm less likely to be repeated in the future by altering their behavior appropriately.

With special emphasis on the “who”, because it’s easier, when they should be focusing on the “how” and “why”. The “why” part is the most important, but also hardest to tackle.