<p>If you just want to “let them know,” that’s fine. But, if your goal is to get them to do something YOU think they “should” do, based on your relationship with YOUR parents, then be careful. You have no idea why the kids stay out of contact. IME, it’s usually a pretty darn good reason. Most kids love their parents and spend years trying to make it work. Estrangement is generally not based on one mild disagreement.</p>
<p>Me? I’d just stay out of it.</p>