I think it is almost impossible to say a differing opinion in things like this without people taking it wrong. They will feel that you are either telling them, that they are causing their loved one issues, by doing too much/wrong things, or they will feel, you don't really appreciate their loved one's complex situation or other way around they will feel you are accusing them of not loving their loved one enough or doing enough for them if they are more in the detachment camp and you are not.
I doubt people too often mean it like that, but that is how people hear it.
To be honest, few people really appreciate hearing differing opinions that don't fit on how they think, when it comes to anything important. Hey, many don't like to hear even differing political point of views, it is no wonder that even less on wants to hear different opinions about anything more personal or sensitive. I think most people go to support group to hear they are doing right things, are doing it fine and no one would do it any differently and are great people. And let's face it, when life is hard, those are the things people often actually need to hear.