Goldziher argued openness to acculturation was Judaism’s original nature.

Evidence

Rather than be a “nation within a nation” as a result of inheriting a closed-off Judaism, modern Jews—distinct from Orthodox ones—were primed for acculturation precisely because they were bearers of what had originally been an open religious tradition. In other words, Goldziher’s orientalism was deeply affected by his rejection of Orthodoxy. — Ivan Davidson Kalmar, Derek Penslar, Orientalism and the Jews, 373