[D-fendr]

Yes, definitely; but the posts indicate: without even being aware of it.

[rzman21]

Most Protestants and Catholics for that matter aren't schooled about the ancient heresies of the Church the way Orthodox Christians and Eastern Catholics are. Note that Baptist controversialists trace their lineage through every heresy that ever cropped up in Church history.

Baptists are Docetists when it comes to the Eucharist. Donatists when it comes to Baptism and their claim that only the worthy belong to the Church. Nestorian in their denial that Mary is the Mother of God. Arian in their denial that the Church has both divine and human attributes just like Jesus. Iconoclast in their views about icons and sacred art.