Hazardousness of claim to the Pre-Islamic Period of Ignorance
110) Narrated Ubai bin Ka'b During the lifetime of Allah's Messenger two men attributed their family lineage. One of them said: I am such and such son of such and such but who are you? You have no mother. Allah's Messenger added: In the lifetime of Musa two men attributed their lineage. One of them said: I am such and such son of such and such till he counted nine. So who are you? You have no mother. The second said: I am such and such son of such and such son of Islam. The Prophet said: Allah revealed to Musa to address these attributers: As for you who attributed yourself to nine, they are all in Hell and you are the tenth. As for you who attributed yourself to two (and Islam), they are in Paradise and you are the third.
(This Haditn is reported in Musnad Ahmad and its chain of authorities is sound.)
Islam recognizes only the righteous man regardless of his origin or race, wealth, or background. The more good deeds he performs the better he is among his fellows. On the same analogy the disobedient to Allah is the worst regardless of his colour or origin, wealth, rank or career etc.