Non uniformed guards at embassies almost always translate as "spies."
Is an assertion, and one you are basing your argument around, NOT a fact. Can you tell me what you base this belief on?
Provide me with some sort of evidence of this and I will readily give credence to your idea. Until you can do that, I have to stand with my origional statement that this sounds more like a conspiracy theorist's wet dream than reality.
I base the belief on what I have read and heard over the years.
But a quick google search turned this up:
"foreign relationsA country's dealings with other countries. Specialized diplomatic bodies first appeared in Europe during the 18th century. After 1818 diplomatic agents were divided into: ambassadors, papal legates, and nuncios; envoys extraordinary, ministers plenipotentiary, and other ministers accredited to the head of state; ministers resident; and chargés d'affaires, who may deputize for an ambassador or minister, or be themselves the representative accredited to a minor country. Other diplomatic staff may include counsellors and attachés (military, labour, cultural, press). Consuls are state agents with commercial and political responsibilities in foreign towns.
"After World War II there was an increase in the number of countries represented by a diplomat of ambassadorial rather than lower rank, although in recent years improved communications have lessened the importance of the career diplomat as the person on the spot.
In the USA foreign relations are handled by the State Department."
I'm sure more can be found.