1)
Which fathers are discussed?
1.
Rashi: The generation of Churban ha'Bayis.
2)
Why does it discuss Hashem's anger?
1.
Malbim: Before the Churban and Galus of Yisrael, Hashem sent His Nevi'im constantly to warn the people and rebuke them, and tell them the future evil. They should repent, to avoid the evil! Hashem opened to return them to Him, and they did not want. Now that the evil came, there is still anger and Galus. Ge'ulas Koresh was not a full Ge'ulah. His anger still exists!