the.com/schism
When one church becomes two, each convinced the other is going to hell.
means A formal split within a religious or political group over doctrine, authority, or principle.
from From Greek schisma, a cleft or division, via the verb schizein, to split — the same root that fractured into schizophrenia.
Great oneEast and West churches split in 1054, still unmended.
Soft cPronounced sizm by most, skizm by purists who argue about it.
Political tooNot just religion; any movement can splinter into rival camps.