Originally posted by inimalist
The other issue is that of shared heritage and of personal identification, where Jews do have a tendency to behave as a racial group (obvious exceptions of course, but "jewishness" is something that many individuals brought up in the faith will hold onto even after they have abandoned any theological connection to the term). This has the obvious problem of not being empirical, and gets into the odd place where someone who "feels" black might actually be physically white, and vice versa.
Sartre's view on this is interesting: "Judaism is neither national nor international, neither religious nor ethnic, nor political: it is a quasi-historical community."