World War II & The Holocaust
"When is Forgiveness Possible?" by Beth Galleto, in ZichronNote: Journal of the San Francisco Bay Area Jewish Genealogical Society" -
"Has this happened to you? While researching your family history, you are suddenly brought to a halt, not so much by a brick wall as by a vast crevice dividing one branch of the family with your family from another. Such divisions are surprisingly common and may continue for generations...."