Why does the Torah need to insert "Ra'isi es ha'Am ha'Zeh"?
Oznayim la'Torah: Refer to Sh'mos, 3:7:1.1:2.
What are the connotationes of "Am K'shei Oref"?
Oznayim la'Torah: Moshe was accusing them of being stubborn - incapable of breaking old habits. Since they worshipped idols in Egypt, they were incapable of changing. 1
And that is precisely what Yonah was worried about - that the people of Ninveh would do Teshuvah, because Nochrim are quick to change their ways but not Yisrael who are set in their ways and do not listen to the Nevi'im. See Oznayim la'Torah who elaborates and who points out that the same applies for the better - that once Yisrael get used to following Hashem, nothing can make them change their ways. Refer to Sh'mos, 34:9:1:6.
