The passage you are thinking of was Jesus fulfilling the Feast of Unleavened Bread. He was removing the "leaven" from His father's house. All over Jerusalem, Jews were doing the same thing in their own homes. Jesus tried extensively to show the Jews who He was. He fulfilled each and every Lev 23 Feast Day to the letter.
Having said all that, I think what Jesus was looking for with self defense was to not live by the sword. Their were people that only wanted to protect their family and property, while others, Like Barabbas robbed and killed people and rebelled against the Roman government. If you come into my home uninvited, there is a variety of weights and calibers of bullets coming your way. If I take the same weapon to the bank and steal their money, they have the right to take me out. God wants His people to not be robber, brawlers, and thugs. If you are saved, then you are part of the Bride of Christ. If someone came against your wife or child, would you not think God would want you to protect His family? Jesus was very careful to tell His followers that we were to be safe as doves, but as wise as serpents. If you have the right to shoot an aggressor, it makes no sense to fret over whether God would approve. Abraham took at least 300 of his servants and defeated 5 armies to get Lot out of trouble. For those that say, "Well, that was the Old Testament", God never changes. For church leaders to preach that we are supposed to cower in a closet while robbers assault our daughters and steal our property is just wrong. These are false prophets and will be judged more harshly in the day of Judgement. If you are assuming a position in clergy without reading and understanding the Bible, it is a weighty decision. I'm also speaking of Graduates of Seminary. Many Seminaries teach false doctrine. I've seen people that wouldn't step on a cockroach because they were taught "Thou shalt not kill" vs Thou shalt not commit murder or thou shalt not shed innocent blood. These are terrible misunderstandings of what God was teaching. Some denominations support abortion, but then are anti capital punishment. That is how screwed up modern Christianity is today.
If you or you family is threatened, protect them. Anyone that has even read a little bit of the Bible knows God's people fought many wars against aggressors. How do we have any conscientious objectors?
Thank you for that post. Very good.