Pass an Amendment.
If you want states to be able to alienate unalienable rights, you pass an Amendment. One which revokes the Fifth and the Fourteenth Amendments, all of the stated purposes of the Constitution as stated in the Preamble, repeals our national charter, the Declaration of Independence, which is the first part of the organic law of the United States, revokes the most important aspect of the natural law, as laid out by Samuel Adams and the Committees of Correspondence, and countermands God Himself and His explicit, imperative command to all mankind as found in Genesis chapter nine.
Good luck with that.