Todd Buras has shared the following thought with me. Suppose one thinks both (a) that the multiverse should be invoked in order to explain the origins of life, because the probabilities in one universe are too low (or, presumably, to explain fine-tuning of constants) and (b) the resurrection of Christ is too weird to believe. Well, in an infinite (naturalistic, I suppose) multiverse, someone very much like Christ does in fact get resurrected—it is very unlikely that the particles should move in such a way as to reverse death, but in an infinite multiverse even such unlikely things will happen. Isn't that an interesting thought? (It reminds one of David Lewis's observation that on his view the Greek gods exist, though he thought—I don't know with what justification—that they didn't exist in our world.)
And, I add, such a thing will happen in infinitely many universes, given an infinite naturalistic multiverse: In infinitely many universes, a monotheistic religious leader named "Jesus" is crucified and rises again on the third day, with all the details being as Christians claim. In our universe, it is claimed by otherwise credible witnesses that this happened—and these witnesses are not contradicted by other alleged eye-witnesses. Why not take their claim at face value, and say that we just are in one of the infinitely many universes where it happens?
Of course, in a naturalistic multiverse, there will also be infinitely many universes where a resurrection is claimed and one didn't happen. But that's not a bigger infinity than the infinity of universes where it's claimed and did happen. Now, one might say: When in infinitely many universes, some set of testimonies not contradicted by any witnesses is true, and in infinitely many universes, the equivalent set of testimonies not contradicted by any witnesses is false, we should suspend judgment. But then I should suspend judgment over the existence of China if a multiverse obtains. For I only know of China on testimony, and in infinitely many universes the testimony is true, and in infinitely many it's false.
So, given a multiverse, it is just as reasonable to assert the resurrection of Jesus as it is to assert the existence of China.
I do not offer this as a serious argument for the resurrection, because the argument can probably be used to show too much. Rather, I think, this highlights the serious problems that multiversists have with probabilistic reasoning.