Question

Hello, Honorable Rabbi.
First of all, I start from the assumption that the Torah is true, in significant part thanks to the Rabbi’s arguments in the fifth notebook. Even so, I wanted to ask the Rabbi about biblical criticism:
In the book of Judges, chapter 2: "And there arose another generation after them who did not know the Lord, nor the work that He had done for Israel." Biblical criticism argues from this verse that the Jewish people did not receive a tradition, and therefore the meaning is that the Torah we have today was invented by that generation. The Rabbi refuted the claim with the question: if the Jewish people forgot intelligently, then why would there be divine wrath? I wanted to ask: why did the Rabbi ask that question? After all, the Rabbi starts from the assumption that the Torah is true, and biblical criticism is not. Their understanding is that the Jewish people invented a Torah, based on the assumption that an entire generation (40 years), the “other generation,” forgot the Lord—and that assumption contradicts every traditional Torah up to that point, so why did the Rabbi ask it? Why does it matter whether the god they invented is angry or not, if in their view it is all just an invention?
I personally understand the Rabbi’s second claim, that this knowledge means connection. But I still have not understood how to refute the claim I mentioned here. Thank you very much.