犹太人没有真正的基因标定。祖上信犹太教,后代就成为犹太人后裔
Marx和Lenin的所谓是犹太人,都是因为祖先有某一支有过信教的犹太人。
至于他们本人,Marx父母在他出生前就成为了基督教徒。所以,他根本不能被称为犹太人。“Marx's family was originally non-religious Jewish but had converted formally to Christianity before his birth.”
至于Lenin,他更是坚定的anti-nationalist