Pacifists reject all violence. They do not think that conflict should be dealt with by resorting to war. They think that other peaceful methods should be used.
Blessed are the peacemakers: for they shall be called the children of God.Matthew 5:9
They also look to the example of Jesus' life for further reasons to be pacifists. When the guards came to arrest Jesus he did not fight back and he commanded his disciples to allow him to be taken.
Do not murder.Exodus 20:13
Today there are pacifists in most Christian denominations. Some Christian denominations teach their members that pacifism is the only acceptable response to violence. Some examples of pacifist groups are the Mennonites, the Amish and the Religious Society of Friends (Quakers).