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?

How did Peter obtain forgiveness for denying Jesus? - Quora

Peter's Three-Time Denial

Questions about People in the Bible (All)

preachbrotherbob: 2013

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

Malchus - Wikipedia

The arrest of Christ, the ear of Malchus cut off by St. Peter; the Agony in the Garden: Christ prays in Gethsemane (background) - PICRYL - Public Domain Media Search Engine Public

The Kiss of Judas and Peter Cutting off the Ear of Malchus. O

Miracles of Mercy

Did Jesus Heal the Severed Ear of Malchus?, by Tony Berard, The Globally Responsible Atheist