So, SCOTUS is hearing a 2nd Amendment case ........................................

"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

During the debates on the adoption of the Constitution, its opponents repeatedly charged that the Constitution as drafted would open the way to tyranny by the central government. Fresh in their minds was the memory of the British violation of civil rights before and during the Revolution. They demanded a "bill of rights" that would spell out the immunities of individual citizens. Several state conventions in their formal ratification of the Constitution asked for such amendments; others ratified the Constitution with the understanding that the amendments would be offered.
Source

IF the framers of the Constitution intended for the 2nd Amendment to apply ONLY to the "well regulated militia", the subsequent portion "the right of the people to keep and bear arms" would NEVER have appeared in the 2nd Amendment. If you don't believe me, read for yourselves some of the writings of John Adams, Thomas Jefferson, Ben Franklin, et al - ANY WRITINGS YOU CHOOSE - the gentlemen were known for meaning what they said, and saying what they meant. I just hope the Nine Robed Ones are true Constitutional Scholars ...............................