(Matthew 5:39) “You have learnt how it was said: ‘Eye for eye and tooth for tooth.’ But I say this to you: offer the wicked man no resistance.”
(Matthew 5:43-44) “You have learnt how it was said, you must love your neighbor and hate your enemy, but I say this to you: love your enemies and pray for those who persecute you.”
Jesus entered the temple area and drove out all who were buying and selling there. He overturned the tables of the money changers and the benches of those selling doves. “It is written,” he said to them, “‘My house will be called a house of prayer,’ but you are making it a ‘den of robbers.’” Matt 21:12-13
This does not seem like a pacifist to me.
Or how are we to interpret this: (I paraphrased)
Jesus also said that if your hand causes you to stumble (sin), cut it off; if your foot causes you to stumble (sin), cut if off; if your eye causes you to stumble (sin), cut it out. It is better to enter the kingdom of heaven with one hand, or one foot, or one eye, than have both and suffer in hell. Mark 9:43-48
Are we really to do this? Of course not. If someone hits us in the face, are we to really turn the other cheek so they can hit us again? No.
Are we really supposed to love our enemies and pray for them. YES!
Do Christians just arbitrarily pick which bible passages to follow? No. By reading the entire bible, we are able to distinguish when Jesus was speaking literally or with hyperbole. Do different denominations disagree on this? Unfortunately yes. But I say the Catholic Church is the correct authority.
“And so I say to you, you are Peter, and upon this rock I will build my church, and the gates of the netherworld shall not prevail against it. I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven; and whatever you loose on earth shall be loosed in heaven.” Matt 16:18-19
In other words, Peter is the first leader of the Church (aka Pope), hell will not defeat this church, and Peter has some special, what we call Infallibility.
Protestants and others will argue this (although even Martin Luther believed this, in fact he wanted to be pope) but a careful look at scripture reveals this to be true. People try and twist the Greek language to show that Jesus was not talking about Peter the rock, but actual rock. But we should remember, when Jesus spoke these words, it would have been in Aramaic, no Greek, and in that language their is no ambiguity.