Satan and Death of Christ Jesus
Satan started to kill Christ Jesus since he left Him in the desert at the end of His 40 days' spiritual training in the desert.
Satan manipulated the Jewish authority to arrest Christ Jesus for his challenge against the authority. Satan occupied the mind of Judas so that he betrayed Christ Jesus. Satan also controlled Pilate, the Roman governor in Jerusalem, so that Pilate would accept the request from the Jewish authority to execute Him.
However, Satan was unsure if God would directly interfere with his plot. But God did not cause any miracles to save Christ Jesus from Satan's hand. Then, Satan realized that God was going to use the death of Christ Jesus to indicate the danger of Satan. Probably God would turn anger of followers of Christ Jesus to Satan.
So Satan made followers of Christ Jesus blame themselves. Satan concocted a theory that Christ Jesus died because of sins of people but not of Satan. Satan made people blame themselves, instead of Satan, for Christ Jesus's death. Satan imbued the minds of people with the idea that the death of innocent Christ Jesus was necessary to have people's sins forgiven by God.
It was an extravagant and crazy idea. But, even to a big surprise of Satan, Christian leaders in the following centuries came to adopt this Satan's theory: Christ Jesus died not because of Satan but because of sins of people.
And, to a further surprise of Satan, God gave Islam to Arabs after Christian leaders adopted Satan's theory. So, Islam is a religion given by God to complement Christianity soiled by Satan.
But, Satan also tried to spoil Islam, having an influence on Islam leaders. There might be even some traces of Satan's influence in the Koran. Therefore, it is better for you not to trust Christianity and Islam 100% unless God says to you to believe them. However, you don't have to adopt Judaism, since the religion does not expect you to be Judaists while there are Christianity and Islam.
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Joh 3:11 Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.
Joh 3:12 If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?