(“idiot’ originated from the ancient Hebrew of 2nd Temple era, “hedyotot” (plu.) was the term for simple country folk, who did not study the Torah at the rabbinic academies of those times. Was never intended to end up in the offensive, westernized form it took on later.)
Nope. The work „idiot” is from Greek and it predates 2nd Temple era. In the Greek city states it was used to describe a person unwilling/incapable of participation in political life.
Very few – if any – Greeks spoke Hebrew and the Greeks and Hebrew cultures developed independently without much contact – until after the conquests of Alexander the Great when suddenly Jews found themselves exposed to Greek culture and the Jewish aristocracy started to hellenize adopting Greek language and customs. (Which in turn leads us to the story of Seleucids, Maccabees and all that). It is likely that „idiot” (as well as other Greek words) was absorbed by Hebrew at this time.