Bro, Catholicism is the true form of Christianity . If Donatists (Berber Catholics) took over, it would be completely different. It centered on a single issue arising out of the persecutions of the early fourth century. That was how should those who lapsed during the persecutions be accepted back into the Church, especially lapsed clergy. Doctrine was not involved.
With the death of Diocletian in 305 and Constantine the Great’s declaration of the Edict of Milan in 313, the persecutions ended. As peace came to the Church, the Church had to face reconciliation of those who had lapsed and wished to return to the Church, particularly among the clergy. While the Church, in general, followed the course of penance and forgiveness, in Africa a strong sense of ascetic purity arose. The members of this “purity” sect expressed strong feelings against those who had lapsed, referring to them as traditors, Christians who had betrayed other Christians. The sect members would not accept any repentance by those whom they considered too be traditors and were not fit for further membership in the Church.