The movement that caused the established churches in the colonies to split was The Great Awakening.
The great awakening occured between 1720 and 1740, it is designated as a religious revival. Jonathan Edwards is considered one of the chief fathers of this movement, he and other preachers stated: that all people are born sinners, that sin without salvation would send them to hell, salvation through confession of sins, that anyone could have a direct an emotional conection with God and that religion should not be formal and institutionalized.
This movement emerged in response to rationalism and the Enlightenment wich emphasized a cientific view of the world. Colonies had no unity on religion so christian leaders traveled from town to town preaching the precepts mentioned before. People embraced those precepts with renewed faith.