It's still referring to Semitic races,it isn't referring to the ancestors of the Roman or Non Semitic sahabis,it is Quran,revealed by Allah,the Noah's ark is only referring to the semites,If a Sahabi was non Semetic why does that matter? The new Message by God,Islam is for all mankind,but the message of Noah was not to all of Mankind,but his own people,so there's your answer.