Hans-Hermann Hoppe: The Last Libertarian Standing

In his book Democracy: The God That Failed (Chapter 10: “On Conservatism and Libertarianism”; Page 218), Hans-Hermann Hoppe writes: "In a covenant concluded among proprietor and community tenants for the purpose of protecting their private property, no such thing as a right to free (unlimited) speech exists, not even to unlimited speech on one's own tenant-property. One may say innumerable things and promote almost any idea under the sun, but naturally no one is permitted to advocate ideas contrary to the very purpose of the covenant of preserving and protecting private property, such as democracy and communism. There can be no tolerance toward democrats and communists in a libertarian social order. They will have to be physically separated and expelled from society. Likewise, in a covenant founded for the purpose of protecting family and kin, there can be no tolerance toward those habitually promoting lifestyles incompatible with this goal." I wonder what the libertarians have to say about such opinions.