Then said He unto them, “But now, he that hath a purse, let him take it, and likewise his scrip: and he that hath no sword, let him sell his garment, and buy one.” Luke 22:36
And why would Jesus instruct some to be armed and what would be the need to be armed if one was not permitted to use those arms?
Christianity is not a wimpy, gutless and pacifist as so many (especially socialist) would have us believe. God doesnot expect us to stand aside or to only pray when evil things happen, or when evil men preform evil deeds. It is our duty to stop them when we can. "Administer justice every morning; rescue from the hand of his oppressor the one who has been robbed, or my wrath will break out and burn like fire because of the evil you have done — burn with no one to quench it." Jeremiah 21:12