Diaspora refers to the scattering of language, culture and religion which was formerly identified with one geographical spot. Christianianity started in one location and scattered across the globe.
A one-god religion came out of somewhere in Canaan. The Romans arrived and the rural Jews wanted them gone. There was a rural preacher who wanted the Jewish Laws followed and who believed the end of the world would come any day.
If the beliefs of this illiterate man, Jesus of Nazarath, had not been altered to match the changing cultural norms of wherever it spread, we would know little about Christianity today. His preference to keep “The Law” was ignored and his beliefs revised to adjust to different cultures. Today’s Christians believe something different than he did.
If we are to believe the Bible, Paul made the changes. The changes so angered those of the original location, Paul was required to apologize. Jesus’ brother, James, demanded Paul be cleansed of his false portrayals of Jesus’ faith.
The clever writing of Paul, first to the Jewish diaspora and later the Christian, made the apologies and cleansing he agreed to for altering the faith meaningless. The oral expressions of illiterate Jesus/James in their original small area were no match for written and recopied letters aimed at the diaspora.
Today, the diaspora claims to follow the faith of its original location. In reality, it has been changed to match different cultures and changing times.
Zealot: The Life and Times of Jesus of Nazarath. Reza Aslan