The reason to re-introduce within common law allodial real estate ownership for private individuals is to strip the state from its implicit claim on all unowned land.
Property taxes are neither more nor less unjust than any other kind of tax, such as income or sales.
The government, such as of a county, can have the power to tax property according to positive law or constitution.
Moreover, the state can in the legal sense own property that it, the state, has homesteaded, such as intra-city roads or CIA buildings.
But it cannot own undeveloped virgin tracts of land within a country by default as some sort of feudal super-overlord.