If you have ever worked in the nursery at church you have observed altruism in the very young. Babies who can crawl and toddlers will do their best to comfort a crying newcomer. They will do this by crawling over and handing the other child their pacifier or their blankie. You might say they extend the hand of welcome to newcomers who are distraught.
When I had my infant / toddler rooms in my childcare I loved to observe the interaction of these little people. I believe God created our brains and their brains to want to comfort others. We see Jesus extending comfort to many in the Bible. So it stands to reason in our churches we should be modeling what Jesus modeled.
This is never truer than when working with the child of divorce. Keep in mind many children of divorce might not get to see these kinds of interactions at home. This is especially true of children who have warring parents in the throes of divorce.
When these children begin to heal and survive the divorce of their parents, if they have found healing in a church, they instinctively want to comfort the other distressed children of divorce. They want to model what has been projected onto them.