Fair enough. It was just that another member's very long involved posts were one-sided homilies that should have been in the Blog section, because they left no room for discussion. I don't have much patience for a whole lot of complicated twaddle where the Scripture has been twisted right out of context to mean something it doesn't mean at all.
However, I will try to answer what you have said in the quote below:
The Old Testament does not say a lot of things...
It does not say anything about Mary's divine assignments
The writers of the OT didn't know about Mary. All Isaiah had revealed to him was that a virgin would conceive and the Messiah would be born. We must remember that the OT prophets wrote exactly what they received by revelation from God, no more, no less.
It does not say anything about God impregnating a woman that was betrothed. That called adultery.
No. That is the Mormon view of Mary's pregnancy - that the Father came down and had sex with her, resulting in the pregnancy. The Scripture says that the Holy Spirit "overshadowed" her. The virgin birth was a miracle and not because of a sexual act, so it wasn't adultery at all. The virgin birth was necessary for Jesus to be our sinless substitute for sin, because the seed of the earthly father bore the "sin line" that made ordinary people sinners. The conception and birth of Jesus had to avoid that, otherwise He couldn't have been the perfect Lamb of God, and therefore none of us could be saved.
It does not say anything about Christ's bloodline to David being through His mother.
The blood line was through Joseph, and that is why they had to go to Bethlehem for the Roman census, and also fulfil the prophecy that the Messiah was to be born in Bethlehem.
The word Christian does not appear in the Old Testament.
The word "Christian" was actually a derogatory word given to believers who appeared to be "little Christs". Over time the Christian identification became an acceptable way of describing believers. It is the same with the first Methodists. That was the unbelievers' nickname for those believers because of their strict "method" of achieving holiness. It is also similar to the symbol of the cross of Christ. In Roman times the cross stood for the most despised, lowest of the low person who deserved to be put to death that way. It was a symbol of shame and degradation, but now it is the symbol of Christian faith and devotion to Christ.
The fact the Christ was crucified and has not returned in 2000 years is not a prophecy.
The thing about prophecy is that there is no actual time limit to it. Joel's prophecy concerning the outpouring of the Holy Spirit didn't come to pass for 800 years. Isaiah's prophecy concerning the coming of the Messiah didn't come to pass for several hundred years as well. There are many prophecies still to be fulfilled, but upon careful study of the prophecies and subsequent history when they were fulfilled, we will see that the fulfilled prophecies came to pass in accurate detail. So if the already fulfilled prophecies were accurate in their fulfilment, then we can have confidence that the future ones will come to pass in the same way.
The fact that the Protestants have fractured Christ's Church into more than 30,000 denominations was not prophesied.
Most mainstream Protestants, Pentecostals, and Charismatics view the church as those who have received Christ as Saviour and who are born again, and not the man-made denominational structures. Therefore the church is not the building or the denomination, but the people who fellowship in them. It is the RCC, LDS, and JWs who link their faith with their "only true church". So you will find that in the majority of Protestant denominations the essentials of the gospel of Christ are the same, and any differences are to do with history, culture, tradition, and styles of worship which are not prerequisites to genuine conversion to Christ.