They were As their name implies, the United Pentecostals were once a part of the Pentecostal Churches, and the Assemblies of God. They were excommunicated from this fellowship for their denial of accepted Christian theology. The United Pentecostals now claim salvation exclusively in their ranks due to their "special understanding" of God and baptism. Dr. Walter Martin and Cal Beisner Debate Dr. Nathaniel Urshan and Robert Sabin. Topics on The Trinity, Salvation, Baptism.