It is impossible to be a Unitarian, deny the deity of Christ in the Trinity, and be a Christian. Christ as God in the flesh for a father, son, and Holy Spirit is the key tenant of the Christian faith.
Correct.
If the term “Christianity” means anything at all its definition hinges upon the Trinity.
One can refer to himself as many things while denying trinitarian unity, but “christian” is not one of them.
This isn’t a matter of mere opinion or individual interpretation it is a matter that has been settled for 17 centuries within the Church… that is, the Eastern Orthodox, Roman Catholic, and Protestant traditions.
