Why is OK to harrass mormons?

[Rhyfelwyr]

I'm Mormon. Which is part of the reason I've been so active in this thread :P. In answer to your first question, I think its a combination of the two. Of course the Jews were expected to keep the Law of Moses, why else would have God given it to them in the first place. But in the end they were saved by the Atonement, just like the rest of us. I don't know what you mean by King David being a Christian, please explain.

The law was given to the Jews to point them to Christ once they saw that they were unable to fulfil it (see Hebrews!). In calling King David a Christian, I mean that he was born again and saved not by the law but by the blood of Christ. When I say 'Christian' I mean simply one that has been saved.

The reason that Mormons say the Bible is not perfect is because they believe it has been corrupted over the centuries.

Well most Protestants would agree that the translations are not necessarily perfect. However they still believe that the Scripture alone contains all that is needed for doctrine and worship etc and the problem is the Mormons added on their own book when there is no precedent for doing so. Jesus himself knew the OT scriptures well and there is strong evidence that the early Jewish believers took it for granted than a NT set of scriptures would naturally complement it. Even within Paul's epistles he actually refers to certain of them as scripture and the early Christians took them as such.

Where then does the Book of Mormon come into things?

I'm not sure what strange practices your talking about, most Mormon practices have some basis in scripture and they're not that strange. Mormonism has no ties to Catholicism, Joseph Smith was born into a Protestant family. Mormons don't believe in the need for reformation because their church is a restoration instead.

If it has no ties to Catholicism then why do Mormons follow unscriptural Catholic traditions like the Sunday sabbath? If it was truly a restorationist movement then it woud have purged itself of these.

I don't get it, why was Jesus baptised then and why did he administer the sacrament to the Apostles?

Jesus observes many Jewish traditions as part of his mission to fulfil the law, and his baptism was one of these. As was the case with the whole Jewish ceremonial law, each aspect of it was in some way a shadow of Christ. As such, water baptism is a shadow of baptism by the Holy Spirit when one is born again. Didn't John the Baptist himself say that "I indeed baptise you with water unto repentance, but he that cometh after me is mightier than I, whose shoes I am not worthy to bear. He shall baptise you with the Holy Ghost, and with fire."

Why then do Christians today continue to look to the shadow when they have the real deal? To return to the bondage of the law is sinful and undoes the whole Gospel, look what Paul thought of the Judaizers in Galatians.