Vejam esse artigo de Greg Boyd, um ex-ateu que virou pastor:
"If Jesus is opposed to violence, why did he tell his disciples to buy swords (Lk 22:36-37)?
First, if we read ahead 12 verses we find Jesus being arrested in the garden. His disciples ask, "Lord, should we strike with the sword?" (vs. 49). Before Jesus can even answer, Peter swings away, cutting off the ear of a guard. Jesus rebuked Peter, telling him that all who live by the sword will die by the sword (Mt. 26:52; Jn 18:10-11). Jesus then healed the guard's ear, showing that the Kingdom he represents advances not by committing violence against enemies but by loving and serving enemies.
Whatever Jesus was up to in telling his followers to buy swords, it's clear he didn't intend them to use them! In fact, had he intended his disciples to use violence to defend themselves it would have contradicted every single teaching Jesus had previously given them about loving enemies, doing good to them, never retaliating, turning the other cheek, etc..."http://gregboyd.blogspot.com/2007/12/why-did-jesus-say-buy-sword.html
"If Jesus is opposed to violence, why did he tell his disciples to buy swords (Lk 22:36-37)?
First, if we read ahead 12 verses we find Jesus being arrested in the garden. His disciples ask, "Lord, should we strike with the sword?" (vs. 49). Before Jesus can even answer, Peter swings away, cutting off the ear of a guard. Jesus rebuked Peter, telling him that all who live by the sword will die by the sword (Mt. 26:52; Jn 18:10-11). Jesus then healed the guard's ear, showing that the Kingdom he represents advances not by committing violence against enemies but by loving and serving enemies.
Whatever Jesus was up to in telling his followers to buy swords, it's clear he didn't intend them to use them! In fact, had he intended his disciples to use violence to defend themselves it would have contradicted every single teaching Jesus had previously given them about loving enemies, doing good to them, never retaliating, turning the other cheek, etc..."http://gregboyd.blogspot.com/2007/12/why-did-jesus-say-buy-sword.html