Is it a time for self-defense, in the name of self-preservation?
Remember Jesus commanded us, saying,
“You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ But I tell you not to resist an evil person. But whoever slaps you on your right cheek, turn the other to him also. If anyone wants to sue you and take away your tunic, let him have your cloak also. And whoever compels you to go one mile, go with him two. Give to him who asks you, and from him who wants to borrow from you do not turn away. You have heard that it was said, ‘You shall love your neighbor and hate your enemy.’ But I say to you, love your enemies, bless those who curse you, do good to those who hate you, and pray for those who spitefully use you and persecute you, that you may be sons of your Father in heaven; for He makes His sun rise on the evil and on the good, and sends rain on the just and on the unjust.” Matthew 5:38-45
Also, Paul told us…
“we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places. Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand. Stand therefore, having girded your waist with truth, having put on the breastplate of righteousness, and having shod your feet with the preparation of the gospel of peace; above all, taking the shield of faith with which you will be able to quench all the fiery darts of the wicked one. And take the helmet of salvation, and the sword of the Spirit, which is the word of God; praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saints” Ephesians 6:12-18
That is how we fight. Not for SELF preservation, but for the purity of the message. Even if it kills us.
Whatever I tell you in the dark, speak in the light; and what you hear in the ear, preach on the housetops. And do not fear those who kill the body but cannot kill the soul. But rather fear Him who is able to destroy both soul and body in hell… And he who does not take his cross and follow after Me is not worthy of Me. He who finds his life will lose it, and he who loses his life for My sake will find it. ~ Matthew 10:27-28, 38-39
The practicality of this non-violent approach can be seen in the life and ministry of the Lord Jesus, in the four gospels, as well as in his Apostles, as documented in the book of Acts.