I thought xianity was not avoda zara for a goy, but I’m not 100% sure. Also, there’s a difference between different types of xianity. Catolicism is very different than Protestantism. Even within Protestantism, there are different types. I know a giyoris who used to be a minister. She told me that in her religious they didn’t believe that yushka was a god.
But again, I’m not sure what the halacha is for a goy regarding avoda zara.
And I didn’t realize about the live shrimp. (gross!)