"In keeping with its violent past, the last vestiges of Donatism vanished in the seventh century as its adherents were mowed down by the sword of Islam, the cry of "Deo laudes" being replaced by "Alahu Akbar," which heralded the Muslim subjugation of North Africa."
It has been argued that the weakening of the Church in North Africa by the Donatist heresy over the centuries made the work of the Mohammadens much easier, not merely in the killing but also in the converting. As we know, west of Eygpt, The Church essentially ceased to exist. It is a particularly dangerous heresy even today.
Ping
Knowing about the ancient (and not so ancient) heresies is vital to any Christians. It's so interesting to see how most of these heresies exist today, whether they are held by mainstream Protestants, cultic Protestant sects (Jehovah's Witnesses, Oneness Pentecostals, etc.) or even some of the schismatic "Catholic" sects (on both the left and the right).
I was almost afraid to find out, half expecting to find some particular group that the author had an axe to grind with. His "modern parallels" actually span many groups over several centuries. I do not know enough about the Donatists or the other groups to say if there is indeed a parallel or not. Interesting article, though.
Curious as to why you refrained from the last two paragraphs.