Original sentence: Genetic studies on Jews have found no substantive evidence of a Khazar origin among Ashkenazi Jews, but have found evidence they have mixed Near Eastern/Mediterranean and Southern European origins.The scope of the conversion within the Khazar Khanate remains uncertain, but the evidence used to tie the Ashkenazi communities to the Khazars is meager and subject to conflicting interpretations
Edited sentence: Genetic studies on Jews have found no substantive evidence of a Khazar origin among Ashkenazi Jews, because the Khazar population has left no obvious modern descendants that could enable a clear test for a contribution to Ashkenazi Jewish ancestry, the Khazar hypothesis has been difficult to examine using genetics, but have found evidence they have mixed Near Eastern/Mediterranean and Southern European origins.The scope of the conversion within the Khazar Khanate remains uncertain, and the Israeli newspaper Haaretz described the evidence used to tie the Ashkenazi communities to the Khazars is "meager" and subject to "conflicting interpretations"