[Roscoe]

You're confusing a right with getting permission to enter private property from the property owner.

A public pool is public property. If a white child may swim there, a black child has an equal right to so.

Where does the right to swim in a public pool come from?

[Alan Chapman]

A public pool is public property. If a white child may swim there, a black child has an equal right to so.

If a white child urinates in the pool does a black child have the equal right to do likewise?

Where does the right to swim in a public pool come from?

Permission to swim in the pool comes from the property owner. Disposition of property lies in the perview of the property owner.