The name Santiago means "saint". Nasar is a Semitic name and even though he is Arab, his name suggests a mideastern origin, like Jesus Since he is not thought of as a native Colombian, he is considered somewhat of an outcast, like Jesus.In addition, Santiago's death is foretold, just as Jesus foretold His own death. Most importantly, Santiago is an innocent victim killed not because he had sexual relations with a young girl, but because he was an outsider and therefore an easy target. Finally, like Jesus, the town sanctions his death because someone has to be the scapegoat and take the blame Angela Vicario's loss of virginity. Thus Santiago becomes what is known in literature as a Christ-figure.
If you look at the way that they both died, it was similar. Santiago was killed against a wooden door, like Christ died on a wooden cross. When they pierced Santiago's side, the knife was clean, showing purity in Santiago. Santiago was killed in white clothing also showing purity. The townspeople were unwilling to really step in and save Santiago, then they felf bad afterwords and that is like when the Jews cursed Christ when he died and they felt horrible afterwards. Then when Santiago was walking around he held his intestines, having God like strength because no one can walk around smiling, holding their intestines.
Also, Santiago had seven fatal wounds. This alludes to seven deadly sins. When Santiago dies in the kitchen, it resembles the eating of the body of Christ in mass. Just as there were three men on a cross, there were three involved in Santiago's murder.
When Santiago died, he died for the sake of the Vicario reputation. He died for his belief in the importance of a woman's purity. In this way, he sacrificed himself for the "greater good" by dying for others' sins.