Spliting Family Tree

The boys and I are reading the life history of Todd's maternal grandfather, Roger. Roger and Todd's grandmother got divorced 5 years into their marriage. I don't want them to be judgmental about people who get divorced, so when I got to the part where Roger writes about his divorce,  I tried to not emphasize it at all. Despite my efforts, I was surprised with the boys' reactions.
You would have thought I had just told them that their kitten got hit by a car. They were devestated. They were sad. They could not believe that such a horrible thing had occured. Knowing that my parents are divorced, Mikey cried out, "Why does there have to be so many divorces splitting up our family tree!"