In what way is the Resurrection the best explanation?

[GrandizerII]

No, he doesn't. He states what the women reported hearing from that man in the tomb, but nowhere in the passage does it say that they did witness the risen Christ. Early Mark simply reported what the women were told. It took Later Mark and the other Gospel authors to state that people did see the risen Christ.

No early Mark ends at verse 8: “And he said to them, “Do not be alarmed. You seek Jesus of Nazareth, who was crucified. He has risen; he is not here. See the place where they laid him. 7 But go, tell his disciples and Peter that he is going before you to Galilee. There you will see him, just as he told you.” 8 And they went out and fled from the tomb, for trembling and astonishment had seized them, and they said nothing to anyone, for they were afraid.”

Mark indicates the disciples saw the resurrected Christ, he just does not narrate that account, even in its early form.

Where? Reread verse 8. It says the women didn't tell anyone about what the man in the tomb told them ...

Yes, they truly believed. It wasn't an insincere belief.  

Yes they believed it truly, as fervently and earnestly as anyone could believe anything. The truly believed that Christ Resurrected, lighting the fire and commitment of the early christian movement. This is not a disillusioned belief, but one that came back after the death and resurrection more alive more impassioned to who Christ was that before. I can see why Christ was so appalling to many before his death, why he had the following he did, I can follow all that myself, and see the allure of his being, but how can anyone come from that scene of living tragedy, not disillusioned? How can the fire of hope survive as it did, without being real?

That's what you passionately believe, fine. But it still doesn't make for a strong case for the Resurrection.

Millerism managed to survive through SDA. Just as how Messianic Jesusism managed to survive through later Christian church.

Not really, Miller is hardly even acknowledged by the SDA. If you look at their beliefs on their official website, they’re almost indistinguishable from generic evangelical beliefs, with some additional peculiarities, like Saturday worship. There’s no mention of Millers failed prophecies, or any reinterpretations of the date he indicated etc… All that appears to have been an embarrassment, to be irradiated from memory.

Um, Ellen G. White followed on from Miller by spiritualizing what he said, exactly how Jesus' second coming ended up being spiritualized by the early church ...