You know, I came to Israel as a little boy from Russia wit my parents. I heard the words dirty Russian every single day at school. All of the people who insulted me were Mizrachim. They beat me every day and called me names just for being Russian. All of them were Mizrachim. I lived in Bat Yam, and later in Ashkelon and all of the people who attacked me for being Russian or questioned my Jewishness were/are Mizrachim, usually of North African origin. On the other hand, most of the Israeli born friends I have are Ashkenazim. Most of the people who are nice to me and friendly happen to be Ashkenazim. Ashkenazim are a lot less hateful towards Russian immigrants than Mizrachim And I'm not the only one. Every Russian I know will tell you the same story. I'm not saying that all the mizrachim are like that or all of Ashkenazim are good. But most of the people who attacked me for being a "stinky Russian" in Israel were Mizrachim while Ashkenazim were usually nice and welcoming.
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from the article: Ashkenazi parent: Sephardi girls have a bad influence on our girls