And again, I reiterate what I said earlier. Where do rights come from?
You're missing the whole point of what the founding fathers and the US constitution was attempting to create.
These inalienable rights "come from" nowhere. They exist innately and the constitution was written largely to express this, and to prevent laws from being created which would stifle or try to remove them. The social construct aspect applies insofar as to how to balance things when the desires or actions of one person impact the rights of another person.
Funny thing that the majority opinion that you are defending clearly says that these rights are social constructs and not only that but that they are found.