From the beginning God has revealed how He was going to redeem mankind due to our rebellion. He has been revealing Himself, speaking through the Prophets since the beginning, revealing what He was going to do in sending His Son to be the propitiation for our sins.
Jesus Christ was innocent and killed by the rulers of that time and really by all of us too, we all sinned and rebelled, all guilty. This has resulted in an opportunity for all mankind to receive eternal life through Him. This isn’t some kind of borrowing from pagan worship, quite the opposite. Satan can only counterfeit and pervert what God does, that’s what pagan worship is, a counterfeit and perversion. As a matter of fact, Satans next attempt will be to help Israel build their Temple and will set himself up in it and declare he is god and command all to worship him, the antichrist and the false prophet doing all kinds of lying wonders to deceive people.
“However, we speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing. But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory, which none of the rulers of this age knew; for had they known, they would not have crucified the Lord of glory. But as it is written: “Eye has not seen, nor ear heard, Nor have entered into the heart of man The things which God has prepared for those who love Him.” But God has revealed them to us through His Spirit. For the Spirit searches all things, yes, the deep things of God. For what man knows the things of a man except the spirit of the man which is in him? Even so no one knows the things of God except the Spirit of God. Now we have received, not the spirit of the world, but the Spirit who is from God, that we might know the things that have been freely given to us by God.”
I Corinthians 2:6-12 NKJV
“that the genuineness of your faith, being much more precious than gold that perishes, though it is tested by fire, may be found to praise, honor, and glory at the revelation of Jesus Christ, whom having not seen you love. Though now you do not see Him, yet believing, you rejoice with joy inexpressible and full of glory, receiving the end of your faith—the salvation of your souls. Of this salvation the prophets have inquired and searched carefully, who prophesied of the grace that would come to you, searching what, or what manner of time, the Spirit of Christ who was in them was indicating when He testified beforehand the sufferings of Christ and the glories that would follow. To them it was revealed that, not to themselves, but to us they were ministering the things which now have been reported to you through those who have preached the gospel to you by the Holy Spirit sent from heaven—things which angels desire to look into.”
I Peter 1:7-12 NKJV