Oneness Theology does not believe in the Holy Trinity.
The Trinity being one God in three persons. Not three Gods but one God made up of The Father, Son, and Holy Spirit. The Trinity is monotheist. The Oneness movement in denying the Trinity teaches that God is a single person who was “manifested as Father in the creation and as the Father of the Son, in the Son for our redemption, and as the Holy Spirit in our regeneration.”
That is problem number one as they twist scripture as such; God revealed himself as Father in the Old Testament, revealed Himself as the Son Jesus during Christ’s ministry on earth, and as the Holy Spirit after Christ’s ascension to the present day.
Problem number two is that they believe in a works based salvation. If you’re not baptized, you cannot be saved! They believe that you must be totally immersed and baptized by the phrase/formula “In Jesus’ Name.” Matthew 28: 19 (NASB) is entirely clear on the words to be used;
“Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit”
Problem number three is they do not believe in predestination although even though the doctrine of predestination is evident throughout the Bible. They believe you can also lose your salvation, and it is entirely up to the follower if they want to be saved. So, in short, they are taking away God’s Sovereignty.
Problem number four is that you cannot be saved unless you speak in tongues. They claim that speaking in tongues is a “necessary manifestation” of the Holy Spirit. In summary, you need tongues to be saved!
Please pray for the follower of the Oneness Movement, and for the Light to be seen to blind the twisting of scripture.