Yes. You are wrong.
Unless they’ve changed the meaning of “to be at all times armed” along with “shall not be infringed”.
Never saw that letter; thanks for the source.
I wonder if one can extrapolate the meaning of an amendment from the excerpt of one letter—the same kind of exercise was done by SCOTUS regarding “wall of separation between church and state” using, ironically, one single phrase from a letter by Jefferson.
Seems to me the founders didn’t think that “bear” arms meant carrying them everywhere or brandishing them without purpose.
Of course, if the “open carry” law is in the jurisdiction, then there should be no problem.