In Judaism, as far as I know, Satan wasn't a being. It was "obstruction", for one. Only in Christianity, and later, in Islam was it personified, in these Abrahamic faiths. Zoroastrianism can be said to predate and be a source of stories (and its sources were the other stories and traditions of the region) that went into Judaism, and Christianity, and Islam, unless I am mistaken. There is a religion which is related/has similar, but different beliefs, called Yazidism. Well, they revere Shaytan (Satan), where Christians and Muslims consider him the source of Evil. To Yazidis, "Evil" and Good are both in the minds and spirits of man (I believe this strongly, as I'm not a coward or finger pointer, for one). Yazidis believe that God created Tawuse Melek (Malek Taus as "he" is referred to in English) from his own "illumination", and he is one of the seven archangels that God has delegated to care for the Earth. He is the chief Angel. This aligns with the somewhat confusing "The Ruler of this Earth is the Prince of Darkness", that has been stated, in spirit, in at least one other religion, I think (Christianity?). I can't be sure exactly how to say this. But it interests me.
Their story about the beginning is the same/similar. God created Tawûsê Melek (Satan/Shaytan), and told him to bow before none other. Then God created later these other six archangels. Then God told them to gather dust, and God created Adam with this dust. He then told the other angels to bow to Adam, and when Tawûsê Melek was asked to (or they were all asked at once), he refused, asking God "how can I, when I was created in your illumination?", more or less. So here, God rewarded Tawûsê Melek, with the position of leader of the archangels, and basically, ruler of Earth/universe. God in this Religion is somewhat deistic, therefore.
http://en.wikipedia.org/wiki/Yazidi
http://en.wikipedia.org/wiki/Melek_Taus
Could it be that when Satan tempted Jesus, that Jesus merely faced "Satan's temptation"? That, to choose, between good, and evil? In this story, of Melek Taus, he obeyed God's first command, and the second one was seen as a test. The story of Abraham has a similar test of good and evil, as it's interpreted by some, although, God first told Abraham to kill his son, and then told him not to (through an angel of God), and he chose the later, perhaps, because it was "good". "Test the spirits".
If you do not believe that "Christianity and Judaism" have sinned, then you are mistaken. And Muhammad, that you speak of in the same line as Jesus, ordered hands to be cut off. And Jesus, wants you to cut your hand off, if it causes you to sin. Metaphor schmetaphor- the ways Christians justify certain words... I'll listen to myself, and myself says that my hand can't cause me to sin. My eye can't cause sin (which he also said to pluck out, if it does). And now, these "new age religions" only see this benevolent Jesus, and see him as an ascended master, when he basically says everyone is going to hell, multiple times, and that the reason he speaks in parable is to confuse people, so that they don't receive the message of God, so that they aren't saved. He comes not to bring peace, but a sword. Jesus referred to a woman, who wasn't Jewish, as like a Dog (in reference to), and only when she got really low, admitting it, saying "yes! but dogs also sometimes get scraps that the children drop!" (something like that), did he help her. He believed he came only for the Jews, and that it was up to them to spread his message.
Deuteronomy 22:22 "If a man is found sleeping with another man's wife, both the man who slept with her and the woman must die."
And Jesus said
Ye have heard that it was said by them of old time, Thou shalt not commit adultery: But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart. Matthew 5:27-28
I should go pluck my eye out? Cut my hand off that spilled seed? What if I trace the cause back to my God-given instinct? I can't cut that off. So I should die.
Religion is so fucked. I can accept this world as an illusion, but it doesn't have to be a nightmare.