What would you do if you came home from work and your wife or sister was being raped by an intruder? Pray for him?
Self defense, and defending the defenseless, even if force is required, is biblical. The death penalty is biblical.
Concerning Luke 3:14, the KJV leaves out the Greek word for extort.
(NIV) Then some soldiers asked him, "And what should we do?" He replied, "Don't extort money and don't accuse people falsely--be content with your pay."
(ESV) Soldiers also asked him, "And we, what shall we do?" And he said to them, "Do not extort money from anyone by threats or by false accusation, and be content with your wages."
(NRSV) Soldiers also asked him, "And we, what should we do?" He said to them, "Do not extort money from anyone by threats or false accusation, and be satisfied with your wages."
(ASV) And soldiers also asked him, saying, And we, what must we do? And he said unto them, Extort from no man by violence, neither accuse any one wrongfully; and be content with your wages.
The soldiers were not to extort money from people by threatening them.