Did you never read the following that He said in Luke 22?
Luke 22:35-36
35 And He said unto them, "When I sent you without purse, and scrip, and shoes, lacked ye any thing?" And they said, "Nothing."
36 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."
KJV
The preacher in the Protestant Church system I was raised in somehow missed preaching about that!
Why would Lord Jesus seem to counter what He commanded us about loving our enemies by saying the above? In reality He wasn't countering what He said about offering the other cheek, and loving our enemies. Sometimes our enemies need some 'tough love' to get them back on the straight and narrow.
And if we are preaching The Gospel, and someone comes up and slaps us on the face for it, that is the situation when we are commanded to offer the cheek also. But that is not a life or death situation.
But if we see a murderer coming up to mug us, or kill us, then He gave us the right to be armed and defend ourselves, our loved ones, our homes, and even our country. And thus His command to His disciples in the above Luke 22 Scripture. He was sending them on the open road to preach The Gospel and gave them to right to protect themselves.
The American founding fathers understood this principle, which is why the language in the 2nd Amendment to the U.S. Constitution says the right of the people to bear arms shall not be infringed.
The false teaching today that we are not to arm or defend ourselves is coming from the Leftist-Communist theory. In documentation of ex-Soviet defectors to the U.S., like Golitsyn who wrote New Lies For Old in 1984, and predicted that in the Communist 3rd phase against the West they might allow the Berlin Wall to come down. He revealed that disarmament was a specific strategy from the Communist goals for world takeover, and such ideas were to be preached in the Christian Church.