There are all kinds of scenarios I can think of in the real world where people "shun" their family members. Lots of high control groups- orthodox jews, mormons, amish, muslim, etc. What about families who disagree with a family member being gay or dating someone of a different race? And that's in the "real world".
I thought when it said "dehumanizing" in the post you were going to write about prisons, monasteries, and institutions that actually strip away at individuality by shaving heads, giving uniforms, rigid routines, etc like what was done in the holocaust. I just don't really see the correlation here, sorry.