That a book is "heavily criticized" does not mean it is wrong. Indeed, I take such criticism as a sign that it is hitting close to home. The criticisms you cite are themselves "no more convincing for all the repetition" and I see nothing more than "unwarranted generalizations" in them.

Brodkin's book resonates with the experience of my own family (I personally know some of her informants as well). As the title suggests, Jews "became white folks." If you read it, you will see that she describes different times and places (including the early 19th Century) when Jews were accepted as white. Race does not exist, but racial classifications change with those who make them.

My parents were not "white" enough to rent or buy in large swaths of Los Angeles when they first moved here in the early 50's. But as Brodkin describes, we started to become "white" enough by the 60's for me to grow up in an "all-white" neighborhood. But that "whiteness" is fragile, and is already coming apart in the Trump era. My cousins were among the survivors of the Tree of Life Synagogue shooting in Pittsburgh, specifically targeting Jews. I’ve even been called a “filthy f&3$(*%@ kike” in comments here on Medium.

It is because race is a made-up concept that we should avoid pigeonholing anybody into or out of a particular "race," but instead work to end racism by anyone against anyone. I thought that was your theme as an "anti-identitarian" - but I guess I was wrong.