Are Oneness Pentecostals part of the true Body of Christ?

I do not believe that Oneness Pentecostals are true Christians. Why, you ask? Because of their false doctrine of the Godhead (they deny the Trinity - that God is one in three distinct persons). They also believe that one must be water baptized by immersion to be saved, that one must speak in tongues to have genuinely receive the Holy Spirit, and that women must not wear pants or contemporary attire or they will be banished to hell at the final judgment. They are a works-righteousness religion that claims to be Christian but is really no different from cults like the JWs and Mormoms.