Questions about how to respond to someone who thinks we shouldn’t say anything against Voodoo since it’s “just their culture” and arguments to refute a proponent of the African traditional religion as a means of worshiping the almighty God.

• When I expressed concern about a movie dealing with Voodoo magic, one of the students said that it’s “just their culture,” as if we shouldn’t say anything against voodoo since it’s a cultural practice. How should I have responded?
• What arguments would you present as a polemic to refute a proponent of the African traditional religion as a means of worshiping the almighty God?