Why did it require Jesus to come down and suffer the death on the cross? Why didn't God just take out the source of the rebellion, destroy Lucifer, and stop the origin of sin in its tracks?
According to Christian mythology in prehistory some angels rebelled and were defeated and cast from heaven. But they weren't really defeated and started attacking mankind. Then at the cross Jesus defeated Satan/Lucifer/devil. But no, not really. Your question is well taken. Perhaps this might help.
God didn't create Satan, man did. Satan (ha'shaitan) occurs by name in the Old Testament in the Book of Job, and here it's clear that the angel Satan is not the Devil! The Devil is supposedly banished from the presence of God, yet in Job, Satan is allowed to talk with and to come and go from God's presence and on a mission for God yet! What's going on? Satan here is not "the Devil" but sort of God's prosecuting attorney, an unwelcome character but not an evil one. There is a very common perception that the 'Lucifer' in Isaiah 14:12ff refers to Satan, the supernatural personification of evil. This misconception comes from two sources. The first is wishful thinking in the sense that it is nice to think that 'the Enemy' will get his come-uppance eventually. The second has to do with the old caution that scripture is to be read only 'in context'. This requires going back and reading all of Isaiah 13 and the earlier verses in Isaiah 14. When this is done we suddenly realize that scripture is not speaking of a supernatural Satan at all but of a Babylonian king with an immense ego. Read Isaiah 14: " 4 you will take up this taunt against the king of Babylon:" What follows is a long rant against this oppressive king filled with numerous references to his human nature like Isaiah 14: "16 Those who see you stare at you, they ponder your fate: Is this the man who shook the earth and made kingdoms tremble, 17 the man who made the world a desert, who overthrew its cities and would not let his captives go home?" This passage is in no way a reference to Satan or the devil. The Jews did not originally believe in devils but they picked up this concept during the Babylonian Exile from the Persians who followed Zoroastrianism. The Zoroastrians believed in both a god of good (Ahura-Mazda) and a god of evil (Ahrulman) engaged in a cosmic struggle. The Jews picked up and ran with this idea. It was easy to cast YHWH in the role of the God of good. They took also the angel ha'shaitan (Satan) in the book of Job and recast that character as Satan the near divine force of evil. Up to that time, their concept of God was of a being responsible for everything, both good and evil. Isaiah 45:”7 I form the light, and create darkness: I make peace, and create evil: I the Lord do all these things.” is just one quote that demonstrates this. The Jews never connected Satan to the serpent in the Garden of Eden. It was the second-century Christian martyr, Justin of Samaria, who was first to argue that Satan appeared as a serpent to tempt Adam and Eve to disobey God. To most modern Christians, the concept of the Devil is a conflation of the serpent of Genesis, the Lucifer of Isaiah and the Satan of Job. This conflation is further supplemented by lurid medieval fiction like Dante's "Inferno". Might it not be better to set these images aside and simply take responsibility for our own evil thoughts and deeds?
