In the LDS church, as in all (that I know of) the Christian world, Jesus is acknowledged as the Messiah prophesied in Jewish scripture. That's what "Christ," means, actually, it's just the Greek form.
Why didn't the Jews accept their Messiah? Well, goes the LDS interpretation, they became so hung up on certain things they hoped for in their temporal lives that they failed to recognize the real mission of the Messiah (the Atonement).
The Jews hoped for the Messiah who would liberate them from Rome and all other captors, but Jesus did not do this. The LDS theology attributes this to their undue concern for their well-being as a nation. They missed their chance because they wanted their Messiah to come solve all of their worldly problems.
Fast-forward a couple thousand years. The LDS church anxiously awaits the return of Jesus, who will kill all the sinners, clean up the Earth, and create an authoritarian system of government based on absolute truth that rules over an ecstatic utopia for 1000 years.
Time out!! Isn't this almost exactly the thing the Jews were waiting for from their Messiah? The thing for which the modern LDS church condemns them?!
Frankly, this seems a bit hypocritical to me.
"The Jews were wrong to want their Messiah to save them temporally. Meanwhile, Jesus is coming to show the world we were right all along and solve all our problems, yay!"