Who wrote the Pentateuch?

It's fine to carry the question unresolved for a while.

I've written this confidently but I would genuinely welcome disagreement.

参考文献を挙げておくので、興味があれば当たってみてください。

I'll list some sources below in case you want to go further. It may be worth questioning the premise of the question itself. I walked the same road. These days I care more about the question than the answer.

この回答は削除されました

参考文献を挙げておくので、興味があれば当たってみてください。この箇所は翻訳の段階ですでに解釈が入っているため、注意が必要です。

There's a long history here, with the argument running from the fourth century onward.

Tracing how the early church handled it locates the modern debate quite usefully. I've written this confidently but I would genuinely welcome disagreement.

You are far from alone in this. I had no answer for a very long time.

もし急いでいないなら、一年ほど寝かせてから読み直すことをすすめます。

Worth adding: a non-canonical text treats the same theme and the comparison is illuminating.