Why should the Kohanim have asked "where is Hashem"?
Radak: They are in front of Hashem the entire day, and offer Korbanos. They should have told the nation serving Ba'al 'where is Hashem, that you serve something else?!'
Malbim: Their function is to bring Shechinah into the Bayis!
Who are "Tofsei ha'Torah"?
Rashi: They are the Sanhedrin.
Radak: They are Chachamim who learn Torah. They did not know Me, for they did not learn Lishmah, to fulfill what is written in it. Rather, they learned with the mouth, but not with the heart. It says "Lo Yeda'uni", because good intent and good deeds is knowledge [of Hashem], not mere learning.
Radak citing Targum Yonasan: Those who teach Torah did not learn to know fear of Me.
Who are the shepherds?
Rashi: They are the kings. Radak - they tend the nation like shepherds tend flocks. This is like Targum Yonasan - the kings rebelled against Me.
Malbim: They are the kings and the officers.
Who are the Nevi'im?
Radak: They are the false Nevi'im.
What is the meaning of "Nib'u va'Ba'al"?
Rashi: They prophesized in the name of the Ba'al.
