Bbbcan you name one of those reasons There is no justification for including a vague reference to something totally unknown Three sources two of which are Kunis herself cite a social environment hostile to Jews as the reason for her familys flight Yes she said at one point in an interview that there were a lot of reasons But when the interviewer prompted her with a followup question about her Jewishness she responded that there was antisemitism in Russia prompting her family to flee There is no indication that the phrase a lot of reasons has any significance Persecution of Jews and antisemitism  are the only reasons amply supported in sources for her familys leaving the country of her birth Three different reliable sources reinforce one another in that contention We need not suggest unknown reasons on equal footing with wellknown wellsourced reasons If we need policy to make that clear one can look to WPWEIGHT Sources provide scant weight for other reasons