Doesn't that ignore the fact that Yiddishkeit is just one part of the Jewish experience? If anything, I would say that side of Jewish history has been given far too much prominence in comparison to the wide range of Jewish identities worldwide. In fact, I would argue that one of the successes of the Zionist movement is that it was able to--by and large--unify Jews of almost every stripe and culture around the idea of a national conciousness and shared narrative.