Through Watchman Nee's teaching Lee began to believe that denominationalism was unscriptural. Some Protestant groups reject denominationalism as well. The desire of Warner and the others was to forsake denominationalism and creeds. This falling away is identified with the development of Catholicism and denominationalism. Efforts to restore an earlier, purer form of Christianity are often a response to denominationalism. This led to denominationalism, which he viewed as the greatest threat to true Christianity. Alexander Campbell had concerns that holding conventions would lead the movement into divisive denominationalism. Some Christians view denominationalism as a regrettable fact. They intended to garner all Indian churches together and thereby eliminate denominationalism. These churches, and a few others, reject denominationalism. Allen regarded "denominationalism" as a sin.