What would be the ramifications of a continuously unified and influential Khazar Khaganate? Rather than collapsing by the 10th century only to be followed by loose confederations of pagan Turks, could a large and militaristic Jewish Turkish empire shape the affairs of Eastern Europe and the Middle East significantly? What would the transition from a nomadic confederation to a more centralized state be like, or could it even be possible? Also, of course, do you think the Khazar ruling elite could significantly convert the populace to Judaism?