I don't understand the trend of framing Jews as White Europeans. Jews are not Gentiles. White Europeans come from different stock. Israel is a nation state of, by, and for Jews. Leave white people out...
But are Kazars Europeans? I would take a Christian nation over a nation of white pagans or atheists. Imperial Russia was probably a better place to live than many European countries. Downfall almost certainly due to not pushing out “White” Kazars hard enough, rather than the vast number of nonwhite Christians.