IMO, the disagreements between posters are not about differing opinions on estrangement stillawipp they're about the language used when responding.
For example, telling someone that the way they responded is insane, that that's not what a proper parent does and they're not a proper parent, isn't trying to understand and help but to 'rub salt in the wound' and more often than not, comes from someone with estrangement in their own family but not someone whose been estranged, but someone who themselves has estranged or whose spouse has done so.
That's why this is often picked up as projection.
There's also the twisting of what someone has posted when replying which is bad enough or saying that things which have never been said, have been.
For example maybe User could say where she's seen anyone say they believe because it's a parent yelling at their child, that makes it somehow more acceptable rather than worse.
As I posted earlier on this thread, context is everything. He didn't 'lose it' just because his son asked him not to pop round uninvited, there's a lot more to this which anyone who took the trouble to read both of his posts, would know.