Our founding fathers were - vast majority - better and more learned Christians than most Americans today, and they had no problem with the concept of self defense. They even finished a revolution and wrote the 2nd Amendment.
Being Christian doesn’t mean being a victim to everyone who have no respect for you as a living person. We have no obligation to passively let others murder us. We have every right to protect our God-given lives from those who would rob us of them over mere material goods.
Sense reading a King James version is in order for this Matthew.