For what it is worth, I sleep with a loaded shot gun in my bedroom, so I am not a hippy or something, but I do believe in the consistent application of non-aggressive principles laid out in the Scripture. Now, onto your question and points:
God is not a pacisifst per se. However, making this extra-biblical declaration about God's nature does not qualify as an accurate, positive statement about God's nature.
Luke 22:36 is a difficult passage to take as evidence in favor of sword ownership or any modern day equivalent, because 4 hours later Christ tells them "Those who live by the sword die by the sword."
It seems more like Christ told them to buy swords as part of what I would like to call "divine theatrics."
Before you laugh this off, please consider the context. Verse 37 says, "That this that is written must yet be accomplished in me, And he was reckoned among the transgressors: for the things concerning me have an end." So, Christ offers an explanation as to why He tells them to get purses and buy swords. It is so when he was arrested, it would be apparent that he would be reckoned to be among the transgressors/criminals/lawless/felons/you get the point.
From the get go, this already instantly discounts any notion that Christ is talking about self-defense here. If anything, Romans 13, 1 Peter 2, the stories of Christian converts that are soldiers are all much better evidence that physical self-defense and meting out of law is something that God does not forbid. However, this is not being talked about here. Obviously, Christ is talking about something else.
Now, before you say, "Oh, Christ would not go through the effort to have a couple swords present just so some prophecy can be fulfilled in such a way," you better reread your Scriptures. Joseph moved his family to Egypt, so that the Scripture may be fulfilled. Jesus arrived in Jerusalem on two donkeys to fulfill prophecy. Look at Old Testament examples of similar things, like parting the Red Sea. God could've just teleported the nation of Israel across the body of water, but God often opts for visible occurrences of events to be educative for us, so we may understand Him.
Now, if the context was not made clear enough in verse 37, we only have to read 12 verses later to see precisely how Christ reacts to Peter misunderstanding what He was getting at when he told them to buy swords:
When those around Him saw what was going to happen, they said to Him, “Lord, shall we strike with the sword?” And one of them struck the servant of the high priest and cut off his right ear. But Jesus answered and said, “Permit even this.” And He touched his ear and healed him. (Luke 22:49-51)
The episode continued in Matt 26:52-54
Then Jesus said to him, “Put your sword back into its place; for all those who take up the sword shall perish by the sword. Or do you think that I cannot appeal to My Father, and He will at once put at My disposal more than twelve legions of angels? How then will the Scriptures be fulfilled, which say that it must happen this way?
Obviously, the owning of swords had to do with the fulfillment of Scriptures and to provide Christ the opportunity to caution His people to exercise restraint, a virtue obviously lost by Christians that live in ascendant, hegemonic societies.
Summary. In the proper context, it is impossible to read Jesus speech about swords any other way because:
1. The reason He gives is so that something in Scripture might be fulfilled (that being that the Son of Man is to suffer and die for sinners)
2. Peter WAS NOT using a sword he purchased earlier. The disciples literally found the swords three seconds after Jesus told them to go get one. Then they looked to Jesus as if to say, "Is this enough to fulfill Scripture?" and Jesus was like "it is enough."
3. The Disciples then use the swords, as they misinterpreted Jesus' arrest as what Christ was foretelling and Jesus tells them not to use them, warning them with a timeless platitude that "those who live by the sword perish by the sword."
It's like divine theater, and it is the opposite of a pro sword/gun/self defense message.