Shlomo Sand’s The Invention of the Jewish People:
There were times in Europe when anyone who argued that all Jews belong to a nation of alien origin would have been classified at once as an anti-Semite. Nowadays, anyone who dares to suggest that the people known in the world as Jews (as distinct from today’s Jewish Israelis) have never been, and are still not, a people or a nation is immediately denounced as a Jewish hater.