Muhammad did not unseal the Mysteries of Bible. That was left for Baha'u'llah to do.
But what does Islam say about who Jesus is and whether or not he rose from the dead? The Christians are claiming he died, appeared to them after, Thomas touched him to see if he was real, and he ate with them. Doesn't Islam say that it wasn't him, but a look-a-like that died on the cross?
But let's look at how the other religions see Jesus:
Hindu--no problem because he is just another incarnation of Lord Vishnu or something.
Buddhist--I don't know? Maybe an enlightened one?
Zoroastrian--I don't know?
Judaiam--He's nothing. The Messiah is to usher in a era of peace. So, not only is he not God, he not even the Messiah.
Christian--mainstream says that he is Lord and God and died on the cross and rose bodily from the grave to conquer Satan and death. He will return to cast devil into hell with all those that aren't written in the Book of Life. At that time, he will bring everlasting peace. None of which Baha'is believe, correct?
Christian--JW, Unitarian, Mormon etc? Hopefully, they'll answer this for us.
Islam--Not God? but Messiah, but didn't die on the cross? something like that?
Baha'i--Not God, but a mirror perfectly reflecting God. A "spiritual" resurrection, not a physical one. There's no real being known as Satan, evil is the absence of light. Humans born "noble" not with a sin nature or "original" sin.
You my be right, somehow, but how is this the same progression? And, still there is no peace in the world. So even Baha'u'llah doesn't fulfill the prophecies for the Jewish Messiah. He doesn't establish the Law of Moses, he brings yet another set of laws that more resembles the laws of Islam.