Barret (the SAME source) tags The Roman Church's persecutions were responsible for over 5 MILLION deaths since the 33 AD.
The SAME source also lists The Roman church with over 240 denominations.
So you too are among those avoiding answering the premise question; what is your working definition of a faction, a sect, an order and a denomination.
When you define "denomination" as a religious organization with a unique authority, which is how Catholicism defines it, we may well find that the number of Protestant demoninations has achieved a number very near the actual number of professed Protestants.