Why did some members of the french resistance fell for the sword and shield theory?

Hello, I wonder how this can happen, per example, the colonel rémy was one of those in this theory and reading his book in the “histoire de la résistance” collection (the collection has a lot of books written by multiple authors, some being from the resistance itself like yves farge[His description of german atrocities in vassieux is quite violent and he does describe his role in the resistance too), parts of it does sound like the sword and shield theory . I think videos debunking the theory and the myth of “vichy protected french jews” could be interesting