What event caused a split in Christianity?

Answer 1

2000 years ago, there were many different groups who followed different men claiming to be hamoshiach. The majority of these different groups (including the Jews who followed the Christian movement) returned to mainstream Judaism once it became obvious that these men weren't hamoshiach. Christianity split off from Judaism altogether once the Christians claimed Jesus's divinity and rejected the teachings of Torah.

Answer 2

There have been a number of splits within Christianity. Probably the two largest are the split between the Eastern Orthodoxies and the Roman Catholic Church, which was over how to phrase the Apostle's Creed; and the Protestant Reformation, which came about after Martin Luther attempted to bring the Catholic Church more in line with specific doctrines in The Bible. Almost all have centered on some point of ideology, however, generally a difference in how to interpret some passage or another.

Answer 3

If you are referring to the Roman and Eastern churches division, I believe it was mainly due to the fact the the Roman Empire split into two.

Roman Catholic AnswerThere was no one event, although "The schism was centuries in the making and finally became fixed in 1054, when the Patriarch of Constantinople, Michael Cerularisu (died 1059), was excommunicated by the papal legates for opposing the use of leavened bread by the Latin Church and removing the Pope's name form the diptychs or list of persons to be prayed for in the Eucharistic liturgy" from the second quote below might be termed the "one event".

from

A Catholic Dictionary, edited by Donald Attwater, Second edition, revised 1957The Schism of the East

the estrangement and severance from the Holy See of what is now called the Orthodox Eastern Church was a gradual process extending over centuries. After a number of minor schisms the first serious, though short, break was that of Photius; from then on tension between East and West increased, and the schism of Cerularius occurred in 1054. From then on the breach gradually widened and has been definitive since 1472. There was a formal union from the 2nd Council of Lyons in 1274 until 1282, and a more promising one after the Council of Florence from 1439 to 1472. After the capture of Constantinople it was in the Turkish interest to reopen and widen the breach with the powerful Roman church; the patriarchates of Alexandria, Antioch, and Jerusalem were dragged into this policy, Russia and the Slav churches stood out the longest of any: none of these churches, except Constantinople itself in 1472, formally and definitely broke away from the unity of the Church. But in the course of centuries the schism has set and crystallized into a definite separation from the Holy See of many million people with a true priesthood and valid sacraments. The origins, causes and development of the schism are matters of much complication, still not fully unraveled.

from

Modern Catholic Dictionary by John A. Hardon, S.J. Doubleday & Co., Inc. Garden City, NY 1980

Separation of the Christian Churches of the East from unity with Rome. The schism was centuries in the making and finally became fixed in 1054, when the Patriarch of Constantinople, Michael Cerularisu (died 1059), was excommunicated by the papal legates for opposing the use of leavened bread by the Latin Church and removing the Pope's name form the diptychs or list of persons to be prayed for in the Eucharistic liturgy. A temporary reunion with Rome was effected by the Second Council of Lyons (1274) and the Council of Florence (1439) but never stabilized

Answer 4

In Christianity, it was Luther's protest against - among others - the Roman Catholic church's practice of selling indulgences, documents that promised forgiveness of sin.

In Islam, the main split - between Shia and Sunni Muslims - was caused by the fact that Shia Muslims decided to recognise Muhammad's son-in-law Ali as his successor, while Sunni Muslims decided to recognise Muhammad's father-in-law, Abu Bakr.