The first schismatics are the Roman Catholics themselves, and then the Greek Orthodox, and they are divided to this day

Spare me the critique of "schismatic" Protestantism beginning with Luther in 1517.

You Catholics and Orthodox were at it over 400 years before us, and still are.

Meanwhile Protestants laid the groundwork for the most free, enlightened and prosperous populations which have ever existed in human history while you sit there arguing about who runs this rathole and that rathole as both are being overrun by Muslims.

In 1053, the first step was taken in the process which led to formal schism: the Ecumenical Patriarch of Constantinople Michael I Cerularius ordered the closure of all Latin churches in Constantinople, in response to the Greek churches in southern Italy having been forced either to close or to conform to Latin practices. According to the historian J. B. Bury, Cerularius' purpose in closing the Latin churches was "to cut short any attempt at conciliation". ... Several attempts at reconciliation did not bear fruit. In 1965, Pope Paul VI and the Ecumenical Patriarch of Constantinople Athenagoras I nullified the anathemas of 1054, although this nullification of measures taken against a few individuals was essentially a goodwill gesture and did not constitute any sort of reunion. Contacts between the two sides continue: every year a delegation from each joins in the other's celebration of its patronal feast, Saints Peter and Paul (29 June) for Rome and Saint Andrew (30 November) for Constantinople, and there have been a number of visits by the head of each to the other. The efforts of the Ecumenical Patriarchs towards reconciliation with the Catholic Church have often been the target of sharp criticism from some fellow Orthodox.