What issue was the most important cause of the split between the eastern and western halves of the Christian church?
1 Should Greek or Latin be used in church services?
2 Should the pope be supreme in church affairs?
3 Should a crusade be declared against the Muslims in Palestine?
4 Should all religions be tolerated in the empire?
The issues that was most important in terms of the split between the eastern and western halves of the Christian church was "4 Should all religions be tolerated in the empire?"
