Ashkenazi Jews are not Khazars
Sources
"No Evidence from Genome-Wide Data of a Khazar Origin for the Ashkenazi Jews", https://digitalcommons.wayne.edu/cgi/viewcontent.cgi?article=1040&context=humbiol_preprints
"Abraham's Children in the Genome Era", https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3032072/
"The time and place of European admixture in Ashkenazi Jewish history," https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380316/
"Sequencing an Ashkenazi reference panel...", https://www.nature.com/articles/ncomms5835