Ohr Chayim on Holy Sparks says that there is a type of holy spar that is attached to the Qelipah and which cannot emerge at all. It cannot develop into a holy soul that is born and eventually joins the Jewish people. Rather it is enmeshed within the Qelpah and it has no way to separate from it other than through the Jews being pained through the suffering of exile OR through the blows inflicted upon them. Through this suffering the holiness within these nations can be extracted and returned to its root to become part of the Jewish people. See [[Az Milifnei Beresheit]].