As soon as Campbell started to distinguish his theology from other mainstream theology he came under attack. In this way Campbell is like most of the leaders that started new religions in the Americas, they came under attack from the established religions. The attack against Campbell came because he claimed the established religions had perverted the gospel with man-made ideas that were not in the New Testament. In return the established churches called his movement Campbellism, something he rejected as a nickname meant to do harm.