Earlier quoted context omitted.
I'm sure in some/many cases there were racial motivations but also SROs that have many unrelated people in individual rooms often become seen as flophouses and are seen as undesirable by other property owners. So they are often prohibited at least in single-family zoned areas.
Certainly, but I'll also argue that single family zoning needs to go, and upzoning enabled anywhere reasonable. Do existing owners not like flophouses? Do they not like density? Do they not like any change at all? All of the above. Property owners are entitled to their property, they are not entitled to stop efforts around them to increase housing supply or density. (as someone who has acquired lots, rezoned, and hav…
Property owners are absolutely entitled to their property but that also includes things like noise, sanitation, and crime. It's called an HOA or a master planned community and approximately 30% of the US population lives in one.
Few people like HOAs but still engage in them despite all the downsides because they specifically don't want to live in high density housing where people are packing 10 or 15 unrelated people to a house, inviting crime, noise, sanitary issues, and all the other negatives of high density housing.