The failure is in defining the 2nd Amendment and enforcing that right as an individual right that cannot be infringed upon by any state.
Agreed. Nor even manipulated or modified by the federal government. The gun laws of 1934 was a serious intrusion, but as with prohibition, nobody came against it. With prohibition, the constitution was descrated twice. Once by passing the amendment, and the second time by removing it.
Also remember, that the first gun control laws were made in some of the Southern States, I believe after reconstruction.
The Federal gov't should have knocked those laws down, but because of 'states rights'did not.
In the case of Prohibition, I believe the Constitution was not assaulted since that was a Constitutional amendment, ratified by the States.
I am not sure how the amendment was removed