George Gruen attributes the increased animosity towards Jews in the Arab world to the defeat and breakdown of the Ottoman Empire and traditional Islamic society; domination by Western colonial powers under which Jews gained a disproportionately large role in the commercial, professional, and administrative life of the region; the rise of Arab nationalism, whose proponents sought the wealth and positions of local Jews through government channels; resentment over Jewish nationalism and the Zionist movement; and the readiness of unpopular Arab regimes to scapegoat local Jews for political purposes.