Espionage ? I remember when we were getting out of Viet Nam. I was for getting out then just as I am for getting out now. People like William F Buckley said that there would be a "bloodbath" if we got out. Ridiculous said those who were for withdrawal. I don't know how many the NVA killed let alone the Khmer Rouge. Certainly anyone who was even remotely suspected to have offered help to the USA.
Now in Afghanistan, where the Taliban used to take people to stadiums where they would perform amputations as punishment, many names have been released through this latest leaking of classified documents. When they cut off peoples hands, feet or heads it becomes more consequential than the mere embarrassment of a diplomat.