What's lovely about this specific moral panic is how pervasive the reverse phenomenon, of parents cutting off their children--for dating the wrong person, or coming out, or leaving the church, etc.--**actually is** and has been for literal generations. It's practically its own literary genre.
This has been a slowly metastasizing moral panic for years: Liberals, drunk on therapy-speak, are cutting off their parents over minor slights and miscommunications.
There is little evidence of the underlying phenomenon and even less of the cause. Look at this egregiously thin nut graf.