[Cronos]

The dictionary definition of evangelical is belonging to or designating the Christian churches that emphasize the teachings and authority of the Scriptures, especially of the New Testament, in opposition to the institutional authority of the church itself, and that stress as paramount the tenet that salvation is achieved by personal conversion to faith in the atonement of Christ.

By this definition, you can't reject the Oneness Pentecostals right to be called evangelicals

[kosciusko51]

Look at definition 3. Frankly, I don’t consider anti-trinitarians as Christians, despite any loose definition that might confer that title to them.