Why? They're all heathens who worship false gods and are either ignorant of or in defiance to the one true God revealed in the Scriptures. Same goes for Muslims.
It really makes me mad when the media lumps Witches/Pagans in with Satanists...not even close to being the same.
Actually, voudon and Santeria are syncretic religions that represent a mixture of African animism with Roman Catholicism - thus the name "Santeria" (ie., worship of the Saints, or Santos.) These religions typically emphasize strong family bonds, community loyalty, etc... animal sacrifices are only used under extreme situations (such as to prevent death or illness) and performed in much the same way that the ancient Jews did them in the OT.
On a related note, it really makes me mad when ill-informed "wiccans" and "neo-pagans" feel the need to lump traditional "black & tan" religions in with "Satanism" as a way to curry favor with ever more ill-informed Noth American Christians.
The African diasporic religions go back for centuries and centuries, starting with the slave trade. There are approximately 50 million followers of what you call "Satanic" all over the world (albeit mostly in Cuba, Brazil & Haiti). There is a saying that Haiti is 90% voodoo and 100% Catholic - huh - some "Satanists"!
On the other hand, what is Wicca? A made-up hoax of a religion based on faulty and misleading scholarship which posited the existence of a stone-age, utopian matriarchy (sorry kids, but this never existed) but in fact draws almost all of its "teachings" from Gerald Gardner's association with Aleister Crowley (speaking of Satanists)- ever notice that Crowley's admonition to "Do as ye will" greatly resembles the wiccan's own pledge? There's a reason for this.... wicca is basically just a popular, feminist, and dumbed-down version of all of that old OTO stuff.
One more thing: if a bunch of "celtic" reconstructionist types want to run around the US and England calling themselves "witches" more power to'em, but bad scholarship and revisionist history does not give them the exclusive right to the words "witch" and "witchraft." Any anthropologist can tell you that witchcraft and shamanism have existed for thousands of years all over the world, and continue to exist, long before (and probably long after)the internet, B Dalton, and people with names like "Silver RavenWolf" and "FaeryDust MoonBeam" have come and gone too.