the Law of Moses before the Second Coming of Christ

3 Nephi 25: 4-5[BOM]
“Remember ye the law of Moses, my servant, which I commanded unto him in Horeb for all Israel, with the statures and judgments. Behold I will send you Elijah the prophet before the coming of the great and dreadful day of the Lord.”
A little context here. Jesus is speaking and he is telling the people both what they should be doing between now and the second coming and what they should expect between now and then.
Now it was told that Elijah shall come before the Messiah, and of course if we are to believe Jesus, then he came in the person of John the Baptist already. “ and if you are willing to accept it, he is Elijah who is to come.” (Matthew 11:14 (ESV)
What becomes even more problematic is the continuance of the law of Moses. The book of Mormon really can’t seem to make up its mind about this. But the New Testament is pretty clear not only in the words of Christ and Paul, but even at the Council in Jerusalem and the visions of Peter that the time for the Law of Moses had ceased.
The Law of Moses required circumcision, which is done away with in the New Testament, as being one of the chief points of contention between Jewish and Gentile believers in the New Testament.
The Law of Moses required Temple worship, at the temple in Jerusalem, and only there as is made clear in among other places the 17th Chapter of Leviticus, and which Jesus makes even more apparent in his discussion with the Samaritan woman in the 4th Chapter of John.
Furthermore the New Testament is clear that Christ is the temple now, and that the body of Christ or the church is this temple today. The reason the temples was destroyed, the curtain ripped from top to bottom at the death of Christ preceding that event, is because it is no longer needed nor desired.
Again The Book of Mormon contradicts the clear teaching of Scripture as we have it in the Bible.