[SunkenCiv]

stable pubic administration

What kind??? ;')

(except for the Jews, of course)

Yeah, one might say the Romans mishandled that situation. /understatement

There were so many Jews still living under Parthian rule in Babylon and points east, and so many commercial connections among them (and to points east), it clearly would have made a bunch of sense for the Romans to work *with* the Jews (who, at their peak, comprised up to 15 per cent of the entire population of the Empire) to take a "peace through commerce" approach to entice the Parthians into peaceful coexistence. The Hellenistic influence throughout the old Persian imperial territory would also have been a benefit.

[Lucius Cornelius Sulla]

I do not think that the Parthians OR the Romans were really into balance of power type relationships. Submit or die was their approach to powerful neighbors.