I think I expected the ending, although I thought they would crucify Ignatz, not eat him.
For me the problem with the story was the concept that alien beings, sometime in the future, would believe in the human version of Christianity. Unless there was something I missed, or a point that the author cut out (about how all alien cultures had a Christ myth or somesuch), the believability was stretched a bit too far for me to really enjoy the story. Also, the scenes on the FTL ship were a very slow point IMO.
The reading was interestingly-done, though on the ship I occasionally lost track of Ignatz while he was talking to the first mate. I would've liked a tiny bit more processing on the alien voice, I think.
Overall decent. Neither good nor bad.