Would Christianity Have Triumphed Without Roman Imperial Patronage?

[Frodo]

Without Constantine (or another Roman emperor lending his support), would Christianity have become as dominant historically in the western world?  Just how crucial was imperial patronage to the long term success of Christianity?

[True Federalist (진정한 연방 주의자)]

Imperial patronage allowed for Christianity to develop an orthodoxy that kept it more or less unified. It also enabled it to supplant the other religions inside the Empire. However, I think the Empire needed Christianity more than Christianity needed the Empire.  Christianity managed to survive or even thrive in areas outside the Empire even before the collapse of the Western Empire.

Roman Emperors had been trying to promote various state cults, with Mithras being the most prominent one, but without much success. The Empire needed a state cult that could promote stability and hierarchy and monotheism is better at that than polytheism.  If there had been a competing monotheistic religion, perhaps it could have been a successful rival, but the various mystery cults that were Christianity's rivals to replace Greco-Roman paganism were only henotheistic with maybe a hint of monolatry. Without the Constatine's embrace of Christianity, I think the Western Empire collapses anywhere from a half to a full century earlier, but also Christianity doesn't develop an orthodoxy.  Once the Empire collapses, then there is no real chance at developing orthodoxy.