Because Roland admits that the 2nd amendment has never been incorporated by the USSC to apply to the states.
" This seemingly simple language has given rise to endless controversy over its interpretation. Beginning with the Slaughterhouse Cases, the Supreme Court has decided cases involving the Fourteenth by selectively invoking only the most minimal and restrictive rights needed to decide each case, and never declaring in dictum that the Fourteenth protects all rights recognized by the Constitution. This has led to the doctrine of selective incorporation of the Bill of rights, most of which have eventually been included in the protection, but a few of which have not."
"Two of the rights recognized in the Bill of Rights that have not been "incorporated" are the right to keep and bear arms of the Second Amendment, and the Fifth Amendment right ..."