How do you know that the Sefardim came “first” are more “authentic” are the “prime source” and are the “original speakers of the Hebrew language”? Aren’t we all descended from Avraham Avinu?
Yes PM, we are, and he spoke sefardit, with a gutteral ayin, and chet, his dagesh chazak was audible (as in a Pei or Beit, or Heh). Even if I were to concede (which I absolutely do not) that the sefardim were not the authentic pronouncers of Hebrew (Yemenite are the most authentic), for absolute CERTAINTY, the ashkenazim are not, simply by virtue of coming along later in history. Adam Harishon spoke Hebrew, and it is pretty safe to assume he spoke it pretty much with the same havara as the Eidot Hamizrach.