By means of careful historical work and exegesis, Streett argues that the secession mentioned in 1 John did not have to do with a later complex Christological issue such as docetism, Cerinthianism, or a devaluation of the historical life/death of Jesus, but rather concerned the foundational belief in the Messiahship of Jesus, a tenet the secessionists had renounced in order to return to the Jewish synagogue. He critiques the common maximalistic mirror-reading approach to the letter as misguided, and contends that the letter is primarily pastoral, meant to comfort and reassure the community rather than to argue against the secessionists. Streett’s main contributions are his detailed examination of the ancient historical evidence (especially the Patristic evidence)  for the Johannine opponents, and his in-depth and innovative exegesis of the key opponent passages (1 Jn 2:18–27; 4:1–6; 5:6–12; 2 Jn 4–11).