1)
Who says this verse?
1.
Rashi: The Navi says, Hashem does all this to redeem us from there.
2)
Why is He called "Hashem Tzevakos"?
1.
Malbim: He rules over all legions.
3)
Why is He called "Kedosh Yisrael"?
1.
Radak: The Kedushah of His name will be seen in Bavel due to Yisrael.
2.
Malbim: He wages Yisrael's quarrel; a person does not.