The Great Compromise

The Great Compromise is a symbol of both the imperfection of the temporal universe and the consequences of demographics on history. Some would also say it is an indication that a Pope's decisions outside the area of faith and morals are not infallible and might even be detrimental to the short term good of the Church. Others would point out that the Church should never impose but merely propose.
The Great Compromise is a legacy of the failings of the Progressive Era and the vast demographic shift of parts of Europe from Christian to Muslim. As secularism was squeezed out Sharia law became the predominate legal system for areas not traditionally Muslim. This did not sit well with all of the non-Muslim population, especially when coupled with the violence against Christians, Jews and non-believers that seemed to follow the Islamitization of most places.
This resulted in a long series of sectarian violence as Christians and secularist started taking reprisals for Muslim violence against non-Muslims in Islamic nations. For every church firebombed a Mosque was set ablaze. The Church spoke out against these actions, but was a lone voice as a combination of fear and survival instinct took over.
The remaining Secular/Christian nations, seeing the result of allowing Islamic groups to engineer demographic shifts through a pattern of emigration without absorption and eventual political manipulation responded by  passing reciprocity laws. That is Muslim immigrants were prohibited from practising their faith publicly because Christians were prevented from public practice of their faith in nations under Sharia law.
Eventually The Christian East looked to the Pope as the one man in the Christian West who could speak for the Unifying Church. At Dover a group from what was left of the European Union, the Organization of American States and various non-aligned nations met with the Pan Islamic Union under the oversight of the Pope.  Under much pressure from the national governments, the media and the Church the resulting treaty became the Great Compromise.
Under the Great Compromise the participants agreed that the reciprocity laws would be codified into international law. Christians would neither  seek converts nor publicly worship in Islamic territories. Likewise Muslims would no longer be allowed to raise Mosques nor establish schools or attempt to convert in Christian territories. A policy of ethnic cleansing would for all intents and purposes be allow by which groups would be "induced" to emigrate out of their homes and into the respective sectarian territories.
As might be imagined many Christians saw this as a betrayal of the Great Commission placed upon the Church by Christ. The Church's position was that Christianity should not be imposed at the point of a spear and rational argument was not possible with a philosophy which rejected rational theological discourse. Time was on the side of the Church, it was argued, and the problem should be left in the hands of the Lord.
While the Compromised reduced, indeed almost eliminated the violence in the First World, Africa continued to be a battleground right up until the beginning of the twenty third century and the invention of the Barnes-Gutierrez Hyperspace Engine and the diaspora.