Why Does Hashem Castigate Yisroel?

The nations of the world are not chastised as much as Israel, and the Torah does not spend time chastising them; but eventually they are entirely destroyed. Israel is eternal, because Hashem constantly corrects them. This is the key to explain the true reason for all the bitter castigations and severe retribution that were showered upon this [desert] generation. — Fortunate Nation