Let me agree and build on what you have said.
When Jefferson combined the references “very people”, “rise in arms”, and “murder(ing)” into a single sentence he was speaking about slaves taking up arms and murdering their masters.
Many slave owners - Jefferson was one - may have, at the time, considered slaves taking arms to murder their masters as slave revolts, or slave rebellions, or slave insurrections.
Whether Jefferson, or someone, later restyled slave revolts/rebellions/insurrections into “domestic insurrections” is being debated here. I would like to continue to study that question and discuss it further.
If, as you say, Jefferson ”may have” considered those three alternative phrases (which you seem to be force feeding us), he certainly did not use them. And that makes the leap from condensing “very people”, “rise in arms” and “murder” to “domestic insurrection” even more of stretch. You are fabricating stepping stones. By the way, Jefferson was chagrined when he learned his Slavery grievance was stricken. Don’t forget that we don’t know who penned the phrase “domestic insurrection” or what it means. Good luck in you research and please keep us posted.