Which races do people of this principle, which contemporary scholars likens to Ilminism, believe are predominate? 
Ilminism:  The "Ilmin" principle has been likened by contemporary scholars to the Nazi German idea of the "herrenvolk" (master race), and was part of an effort to consolidate a united and obedient citizenry around Rhee's strong central leadership through appeals to nationalism and ethnic supremacy.
i don't know