I have gone through three divorces myself - my mother and father, my mother and adoption father and my father and stepmother.
I do not know how to explain how I feel about that. As distant as it may sound, it is their problem if their relation does not work out well, and it is their decision to divorce or stay together.
Hard as it may be, the child is always the victim because they will have to miss one or the other and will have to adapt to the new situation, but adapt it will. I got used to it. It is "normal" to me, and it taught me many things (one of those being not to get married too soon and not to treat my child as if they are too stupid to understand any of it).