Luke 7:26-29 shows Jesus affirming John as a prophet and the people acknowledging God's justice through John's baptism — explaining the popular conviction in Luke 20:6.

Luke 1:76 prophesies John as a prophet of the Most High — the basis for why the people in Luke 20:6 are persuaded John is a prophet.

Matthew 14:5 has Herod fearing the people because they held John as a prophet — same fear of popular opinion regarding John as in Luke 20:6.

Matthew 21:26 is the direct parallel: the same reasoning about fearing the people who hold John as a prophet.

In Mark 12:12, the same leaders fear the people after Jesus' parable — they perceive he spoke against them and seek to arrest him.

Mark 11:32 is a direct synoptic parallel — the leaders fear the people because all held John was a prophet, identical situation.

John 10:41 records people affirming John's testimony about Jesus, showing John was still regarded as a true prophet — supporting the people's view in Luke 20:6.

In Acts 5:26, officers fear being stoned by the people when arresting apostles — mirroring the leaders' fear of stoning in Luke 20:6.