Why did Peter cut off the ear of Malchus, one of the people trying to arrest Jesus?

Why did Peter cut off the ear of Malchus, one of the people trying to arrest Jesus? Why did Jesus then heal Malchus’s ear?

Peter, Cuts of the Guards Ear ⋆ Diana Leagh Matthews

The Chronological Gospel: Arrest and Sanhedrin

Peter Denies Jesus

30. Jesus' Arrest and Trial (John 18:1-19:16). John's Gospel: A Discipleship Journey with Jesus

Ear of malchus hi-res stock photography and images - Alamy

Peter, Cuts of the Guards Ear ⋆ Diana Leagh Matthews

Ear of malchus hi-res stock photography and images - Alamy

What was the significance of Jesus healing the soldier's ear that Peter cut off? - Quora

Bible Fun For Kids: Jesus in the Garden of Gethsemane