Oneness Pentecostals feel that those who do not speak in tongues are not saved. So they do not accept 99.995% of Christians as ligit. I knew a guy at work who was oneness Pentecostals and was not a warm and loving guy. He ended up back sliding after his fanatical wife left him and was actually a better guy as a sinner than as a Oneness Pentecostal. I cannot say they are not saved, but everyone of them I met are very mean people. Especially to their young people.
I am Wesleyan Pentecostal. I believe that , like William Seymour, one must tarry and wait on the Lord for more of him. Here is the doctrine as I believe it in metaphor to the Hebrew Temple.
1. Justification - We are justified through faith -
The Outer Gates
2. Salvation - A simple profession of faith in Jesus or sacrifice is all that is needed for salvation.
The Alter
3. Outer Sanctification - Conforming oneself to a righteous believers standard. -
The Laver
*****Inner Temple - Jesus is the door! Inner sanctification******
4. The Word - Growing daily in the word of God -
The Table of Shewbread
5. The Spiritual Light - Paul called these the fruits of the Spirit - T
he Candlestick
6. Prayer and Praise - Alter of Golden Incense
****The Vail of the Inner Temple
7. The Baptism in the Holy Spirit - The anointing!
In which William Seymour, the architect of this doctrine warns....
Whenever the doctrine of the baptism in the Holy Ghost will only be known as the evidence of speaking in tongues, that work will be an open door for witches and spiritualist and free loveism. That work will suffer because all kinds of spirits can come in. - William Seymour
Here is the image I copied and enhanced from Seymour's book...
And a video on the subject
Paradise Regained... w/ Darlene Zschech, Joel Osteen, and Cindy Cruze Ratcliff - YouTube