Lama Ole’s answer:
Don’t visit them too often, but try to always stay friendly while you are there. Every generation has its own lifestyle, and when they encounter each other they each do their best to bridge the gap. When the visit isn’t going well, you go home again and try it later by phone.
From a certain age on, people fall under monument protection anyway; you have to behave yourself with them and not shake them up too much. Check whether they are still able learn something new or whether you can only round off what is already there and give them a few good impressions to take with them into the next life.
Our parents have done so much for us, and they rebuilt Europe after the wars. So, we really owe them something. We should see how we can bring them happiness and try to treat them well. But sometimes treating them well means not visiting them too often and calling them on the phone instead. When that also leads to arguments, then it’s better to write postcards: “I’m doing well and thinking of you” and so on. And each generation can do its own thing.