Shoftim 18: Which Expulsion

In a throwback to the end of Joshua, the tribe of Dan is restless. They are not satisfied with their allotment and decide to go on a reconnaissance mission.  Along the way, they encounter Micha and his priest, idol, and ephod. The Danites take everything and bring it to their newfound land. That land is populated by a tribe of Phoenicians that the text emphasizes were not harming or bothering anyone. The Danites massacre the tribe and take over the land and name it after their forefather Dan. The story end with a cryptic phrase: “The Danites set up the sculptured image for themselves; and Jonathan son of Gershom son of Manasseh and his descendants, served as priests to the Danite tribe until the land went into exile” (וַיָּקִימוּ לָהֶם בְּנֵי־דָן אֶת־הַפָּסֶל וִיהוֹנָתָן בֶּן־גֵּרְשֹׁםבֶּן־מְנַשֶּׁה הוּא וּבָנָיו הָיוּ כֹהֲנִים לְשֵׁבֶט הַדָּנִי עַד־יוֹם גְּלוֹתהָאָרֶץ) (verse 30). Which exile? It would make sense that the text is referring to the exile of the ten northern tribes during the Assyrian assault. This is Rashi’s opinion. The problem is that that will not happen for hundreds of years. According to Baba Basra 14b, Samuel the prophet wrote the book of Judges. Samuel died well before David united the tried under one kingdom, which was hundreds of years before the expulsion of the northern tribes. If Samuel wrote the book, then why (or how) would he reference something that happened hundreds of years after his death? Furthermore, how would David and Shlomo have allowed this idol worship center to persist in the north during their reigns? As to the second question, the Malbim explains that David did remove the idol worship and the “priestly” line of Jonathan repented. When Jerobaam became king of the Northern tribes, he installed a new idol in Dan. He reinstalled the family of Jonathan as the priests of this idol. Radak explains that the expulsion here has to be taken in context of Samuel. Samuel would be talking about the expulsion of the Ark when it was stolen during his lifetime. That is why the text says “expulsion of the land” (גְּלוֹת הָאָרֶץ) and not expulsion of the tribe of Dan or the expulsion of the Northern Kingdom.  Ralbag explains that this expulsion wasspecific to this land of the Danites. This took place at the hands of Yavin theking of Canaan. And that is why Devorah referred in her song “Dan why do youtravel by ships?” (וְדָן לָמָּה יָגוּר אֳנִיּוֹת) (5:17). Neither of the Dan territories was near the water. This must refer to the northern Dan tribe fleeing over the Jordan river after they were expelled and would also mean that this story took place before the story of Devorah earlier in the book.