clearly refers to diplomatic staff.<<<......HUH??
...where did u find that written??...source please...how about Indians at the time?
Indians are in their own sovereign country when on the reservation of the 14th Amendment time. When Indians are off the reservation in the US they are under the jurisdiction of the Feds and States, just like you and me. (actually who has “jurisdiction” over what and whom on a reservation depends on the language of the treaty, etc. Not all reservations are the same.)