Nobody here is advocating militarism, or condoning the "military/industrial complex" that Eisenhower spoke against.
Self-defense is something entirely different. Self-defense is not immoral.
There is an appropriate time for arming oneself.
Since you chose to quote from Luke, let me quote this to you --- from Luke:
35 - And He said to them, "When I sent you without money bag, sack, and sandals, did you lack anything?"
So they said, "Nothing."
36 - Then He said to them, "But now, he who has a money bag, let him take it, and likewise a sack;
and he who has no sword, let him sell his garment and buy one.....
38 -Then they said, "Lord, look, here are two swords."
And He said to them, "It is enough."