> "There must be in-groups whom the law protects but does not bind, alongside out-groups whom the law binds but does not protect."

Do you know the source of that quote and the context? It was Frank Wilhoit explaining the core of the problem with conservatism. He wrote it when proposing anti-conservatism. To quote it as a general rule of life presumes that conservatism is the only way humans can organize a society.

Yes I do and perhaps instead of making that presumption you could simply understand conservatives to be those who perceive themselves to be part of that higher social class (or at least want to).