The first amendment has restrictions. The second amendment has no restrictions. These weapons are not in the hands of “well-regulated” militias. The changes the people are demanding do not desecrate the second amendment, they just make it a safe addition to our constitution.
Define the militia at the time the amendment was passed.
The best way to understand the Militia in the mid to late 18th century is to read biographies of our founders. Chief Justice John Marshall was a Cap't in the Militia who recruited farmers and shop keepers and regularly trained them.
See in the linked, the table of contents the number of our founders and signers of COTUS here:
Soldier-Statesmen of the Constitution
The seem to put in question Scalia's argument in Heller that the 2nd A. was not in any manner related to membership in the militia.