Why has Andrew Sullivan started referring to Iran as Persia and Iranians as Persians? Is this some left-over English tic that has suddenly resurfaced, or is it supposed to be some kind of ...

the old language of Persia/Iran, and ‘Indo Aryan’ i.e. Sanskritic are very close akin indeed. My mother is a Parsi, so I was fascinated to see that the Aryans may well have been Zoroastrians.