"However, the situation for the party soon turned difficult. Large sections of the Soviet and North Korean communist leaderships did not trust the party, and saw it as a potential nest for counterrevolutionaries. The most troublesome issue was that the North Korean Ch’ŏndogyo continued to have contacts with the leadership of the religious group in South Korean Seoul. There, the Ch’ŏndogyo leadership was anti-communist and supported the administration of President Syngman Rhee. In January 1948, the Ch’ŏndogyo leadership based in Seoul made a decision that a massive anti-communist demonstration would be held on 1 March in Pyongyang. This put the Chondist Chongu Party in the North in a precarious situation. Kim Tarhyon refused to follow the orders from Seoul, but others in the party leadership wanted to go ahead with the plans. The result was a massive purge of party members throughout North Korea. In its aftermath, the anti-communist sections of the movement initiated an underground resistance movement and tried to launch guerrilla warfare.

Kim Tarhyon and the people around him reaffirmed their loyalty to the DPRK. In 1950 the Chondoist Chongu Party in the South (but not the religious movement) united with the Northern party under his leadership. During the Korean War the headquarters of the party was shifted to a town near the border with China. The party leadership actively supported the DPRK war efforts, but many party cadres migrated to South Korea during the war. Many sided with Seoul during the war. In the aftermath of the war, the idea of the united front was increasingly unpopular in the North Korean government circles and many wanted the non-communist parties banned. In the end the united front was maintained, but the possibility for the Chondoist Chongu Party to conduct political activity was severely curtailed.

In 1954 the government subsidies to the party were cancelled. By 1956 there were approximately 1,700–3,000 members left (out of 10,000–50,000 remaining Ch’ŏndogyo believers). At the same time about 200 persons were full-time employees of the party. In order to finance the party, it ran an iron foundry and a printing house."

Pretty funny from your link