Peter did not do anything to one of the Roman soldiers who arrested Jesus as the Roman soldiers were not involved in the arrest. The High Priest sent some persons along with some Temple guards to arrest Jesus. One of these persons was "Malchus" who was a servant of the High Priest. Peter drew his sword and cut an ear of Malchus off. Jesus took the ear and placed it back on Malchus' head. This is the only place in Scripture where Jesus healed a fresh wound.
the roman soldiers themselves arrested peter and the roman emperor had peter killed.
No. According to the New Testament Peter was a fisherman. Jesus had no soldiers in his original group of followers.
the Romans thought that Jesus was a threat to the roman government
In the Bible, it is written that Simon Peter cut off the ear of a Roman soldier named Malchus while trying to protect Jesus from being arrested in the Garden of Gethsemane.
Roman soldiers
Pilate's soldiers were referred to as Roman soldiers or legionaries. They were part of the Roman military forces stationed in Judea during the time of Jesus. These soldiers were responsible for maintaining order and enforcing Roman law in the region, including during the trial and crucifixion of Jesus.
The soldiers of the governor, (Matthew27.27 to 35).
Judas
Roman soldiers
Peter was the disciple who cut off the ear of the Roman soldier when taking Jesus to Pilate. Jesus then miraculously healed the soldier's ear.
A band of Roman soldiers looking for Christians to take to jail.
After crucifying Jesus, the soldiers were not specifically mentioned in historical records. It is likely that they continued their duties as Roman soldiers without facing any consequences for their actions.