1)
Why should one ask the Goyim?
1.
Malbim: Also Goyim heed Nevi'im who rebuke them and warn them against evil. Ninveh is a proof!
2)
Why does it say "Mi Shama"?
1.
Radak: We never heard that a person would abandon Tahor, and go after excrement and filth.
3)
What is "Sha'aruris"?
1.
Rashi: It is a reproachful matter.
2.
Radak: It is dirt and filth.
3.
Radak citing Targum Yonasan: It is change - [Yisrael] did something unusual.
