Was that a constitutional argument? No? I didn't think so.There are certain areas of necessity where the government needs to step in or else they create an environment where white privilege becomes a huge problem. Things like discriminatory land sales, discriminatory sales of fodd to black people, discriminatory hiring practices, and things that deny a necessity based on prejudice are increadibly harmful to minorities. I use black people as an example but you could put hispanics, gays, women, or certain religious groups within this. I am all up for private clubs who operate on voluntary and non-necessary membership to be allowed to discriminate.
I would even be up for a small number of segregated communities to operate. I havce seen a reason for things like restricted elderly communities, and even communities where strict religious beliefs are help by it's voluntary membership. I lived in NY and there were a few orthodox jewish communities and i could see why the orthodox members might want to live in seclusion. But I think over all that those communities should be in areas where they do not restrict property ownership because it is needed for minorities. For example a jewish community in a city would put stress on the other non-jewish people because they take up finite resources of housing and land. But if you put it out in some less populated areas with tons of land resources I have no problem with it. I just used jewish and elderly communities because I have seen them do fine in places like the northeast and Florida.
In essence the US has shown that when allowed overwhelming practices of prejudice by private business cause massive disparities in diversity and wealth opportunities for minorities and harm the community. They create a power structure that becomes monopolized by the prejudiced factions and that simply cannot be allowed in a country that values opportunity for all. We had that freedom for a time and we showed that it damages peoples lives on a massive scale when allowed to operate unchecked. Don't blame the government because people cannot operate in a moral and ethical manner.