“To suppose arms in the hands of citizens, to be used at individual discretion, except in private self-defense,”
If the representatives of the people betray their constituents, there is then no recourse left but in the exertion of that original right of self-defense which is paramount to all positive forms of government, and which against the usurpations of the national rulers may be exerted with infinitely better prospect of success than against those of the rulers of an individual State. In a single State, if the persons entrusted with supreme power become usurpers, the different parcels, subdivisions, or districts of which it consists, having no distinct government in each, can take no regular measures for defense. The citizens must rush tumultuously to arms, without concert, without system, without resource; except in their courage and despair.
Alexander Hamilton, Federalist No. 28
I don't see anything about the 2nd Amendment (which didn't exist when that was written) there. You seem to be confusing the word "context" with the phrase "emanations from penumbras."