What is so confusing. Both Christianity and Judaism have history of making food offerings to God.
Leviticus 23:36
Quote:
The Festival of Tabernacles
33 The Lord said to Moses, 34 "Say to the Israelites: 'On the fifteenth day of the seventh month the Lord's Festival of Tabernacles begins, and it lasts for seven days. 35 The first day is a sacred assembly; do no regular work. 36 For seven days present food offerings to the Lord, and on the eighth day hold a sacred assembly and present a food offering to the Lord. It is the closing special assembly; do no regular work.
The Torah has very detailed specs on different types of food offerings. That has morphed over the years to us blessing the food for the nourishment of our bodies. If you kill an animal for food consumption that is not a sin or amoral. If you use that food in some sort of religiously themed meal, still not a a sin or amoral.
But I think the real point is that Voodoo practitioners are not out stealing Tabby and Spot from backyards, gutting them, dancing in their blood while chanting creepily like we see in Steven Seagal movies or in Pat Robertson fever dreams. There are centuries of lore that have crept up regarding voodoo that have more to do with being uneasy with African or Caribbean immigrants than it does with an actual understanding of that religion.