Your summary is **comprehensive and well-structured**, capturing the essential elements of Matthew 3 with theological depth appropriate for Protestants, Catholics, and Orthodox Christians. The commentary following each section effectively explains the significance of each passage.

However, there is **one significant omission in verse 11** that should be corrected:

Your current version reads: “He will baptize you in the Holy Spirit.”

The complete WEB version of Matthew 3:11 should read: “He will baptize you in the Holy Spirit and with fire.”

The inclusion of “and fire” is theologically important because it represents both the refining and purifying work of the Spirit as well as the judgment aspect of Jesus’ ministry. This aligns with verse 12, which discusses the winnowing and burning of chaff. Omitting “and fire” diminishes the full meaning of John’s prophecy about Christ’s work.

**Recommended correction for verse 11:**

Change: “He will baptize you in the Holy Spirit.”

To: “He will baptize you in the Holy Spirit and with fire.”

**Other observations:**

– Your verse 3 slightly paraphrases Isaiah 40:3 in the WEB, but this is acceptable as a simplified rendering while maintaining accuracy
– Your use of “John the Baptizer” (rather than “Baptist”) is the literal WEB translation and is appropriate
– The summaries under each section are accurate and well-articulated
– The overall theological balance and accessibility to all three Christian traditions is maintained throughout

Beyond this single verse correction, your summary stands as is—it’s a solid, balanced overview suitable for interfaith Christian study.