Academic, Jewish & Israeli Shlomo ... SAND upsets some doctrinal Israeli ethnocentrism, posing, the great pleasure of the rabbis, that every Jew is from the seed of Abraham. S. Sand, exhibits, from data of all kinds, available to all historians, but a little hidden, the second diaspora was not massive, but rather a spin. The bulk of the population, Jews "Strain", but also converted pagans & would have stayed. The "disappearance" of the Jews is due to their conversion Christianity, at first, and then to Islam. And not at their physical departure ... This opens walks on the possible origins of the current Palestinians. If we admit that the diasporic institutions in the Mediterranean basin, and also were less provided that one grows, the conversion - or better, the Judaization of the pagan indigenous - allowed fleshing Demographic diasporic communities. (Very proselytes). In short, an inextricable mixture, both in Eretz Israel in the galut. That undermines, at first, the homogeneity geneity of "race". And, therefore, that the "cement" that binds Jews & the rest of the world ... judéités religion. Religion, one piece of "origin" ... We can also hold onto the "Jewish humanism", if preferred. Here is a work of simple, original, argued, without recourse to the abstruse language "specialists", and who, quietly - this is the least we can say - is rocking some certainties;