1)
In Melachim II, 8:19, it says that Hashem did not want to destroy Yehudah Lema'an David!
1.
Malbim: Ezra explained here that it means that He did not want to destroy Beis David, the Malchus of Yehudah.
2)
What is "Nir"?
1.
'Rashi': It is the yoke of Yisrael.
2.
Refer to Melachim II, 8:19:1:1.
3.
Radak: This is like Ner; the king is like a lamp, that illuminates 1 . This is like Ben and (sometimes it is written) Bin, Rash (poor) and Rish (e.g. Mishlei 28:19).
1
Radak (Melachim II, 8:19): This is like "Arachti Ner li'Mshichai" (Tehilim 132:17).
