I think it wasn't necescarily Christianity getting it's revenge on a guy who ate meat on Good Friday. In the scene with the fortune teller the group is warned not to mess with spirituality in general. Joe being an athiest seems to mock all of it, ghost spirits, and mostly Christianity. So if you're looking at it from spiritual point of view, it's not strictly Christ who's being wronged.
I have to agree with you though. The lady he raped cursed him. Then the fortune teller later explains that Satan will come at midnight and take his soul. I don't know a whole lot about religion but I think Satan is mostly a Christian belief. If you sin you will go to hell, etc etc.
__________________
|