I didn't ask about “the assembly itself, as an entity”.
I asked about people. I asked: “Can an individual assemble alone? Are not “the people” as used here a collective with the right to do something that an individual can not do alone?”
Responding to my own first question, I'd say that an individual assembling alone is a contradiction in terms and the answer to the question is “no”.
Responding to my own second question, I'd say that “the people” as used here is a collective term, (”people” is a collective noun). Further, “the people” as used here are a collective with the right to do something that one of the people (an individual) can not do alone.
That casts doubt on the assertion that “A collective has no rights;”.
“As for the right to trial by jury and the right to vote, I believe the philosophical underpinings of both, i.e. the right of liberty, make the particular expressions of that right unalienable.”
That too seems to respond to something I didn't ask but not to what I did ask which, rephrasing a little, was: Are you saying the right to a trial by jury and the right to vote come from God and exist regardless of human government?
Once again responding to my own question, I'd say that they come from God in so far as everything comes from God directly or derivatively. As to whether or not they exist regardless of human government, I'd say that the rights that come directly from God are what we call natural rights, those rights humans have in a state of nature absent an organized society. Once humans form more organized societies, with governments of whatever sort, they derive rights which do not exist in a state of nature, such as the right to a trial by jury or the right to vote. The existence of such rights depends on the nature and actions of the societies and governments humans decide to form.
You're tying yourself into knots. Your reason for tying yourself into knots is not apparent to me.
A person has the right to assemble with other people. The right emanates from a single person. That the individual right is exercised in concert with others doesn't all of a sudden transform the individual right into a collective right because a collective right emanates from a group of people that, were it not a group of people, would not have that right.