The author of that article added the Orthodox to the list. The sheer ignorance of that individual shows in the very first sentence:
If you are Orthodox, your religion broke away from the Catholic Church from the 9th to the 12th centuries
Given that the mutual excommunication of the Bbishop of Constantinople (by a dead Pope and an illegitimate legate) and the Bishop of Rome (by a legitimate and living Bishop of Constantinople) occurred in 1054 (11th century), one must wonder what this individual had in mind.
The muutal excommunications (which were directed at two individual bishops and not particular Churches), were revoked and 'committed to oblivion' in 1964 — a fact that some still choose to ignore. As far as the Church is concerned, it never happened. But die hards will always be a few.
not to mention that it was the Bishop of Rome who went against the canons of the councils and split from the 4 other ancient sees...