What Vodou is...versus what it is not!
Some people will describe Vodou as a polytheistic religion, i.e. worshipping "many gods". This is not, technically speaking, true. The Vodou religion is monotheistic in that there is a belief in only one supreme deity, known as Bondye/Bondieu (God). Vodouisants might venerate a number of "spirits" or "angels", known as the lwa, but we do not worship them. Many Vodouisants also revere the Catholic saints and angels, and we will often have a shrine to our ancestors as well.
Some movies have portrayed Vodou is a cult, but nothing could be further from the truth. The modern understanding of the word "cult" seems to expect members to proselytize (seek to convert others to their way of thinking) and it also requires a single, charismatic leader to tell everyone else what to do. Well, Vodou is a very eclectic religion and practitioners do not seek converts. Furthermore there is no overarching body or church. Many will practice their path alone at home or sometimes with friends. Others might join a Society of fellow Vodouisants (frequently these Societies can be found online) and they may choose to train with an initiated priest or priestess, their Vodou "Papa" or "Mama", but these are far from cult leaders. (For those Vodouisants who wish to take their practice even further, the choice can be made to "take ceremonies" and become a Hounsi (initiate), Houngan (priest) or Mambo (priestess) themselves.)
Human Sacrifice, Zombies and Voodoo Dolls ???
Some religious extremists will label Vodou (like everything else they do not understand) as "devil-worship". In fact, nothing could be further from the truth. Just like any religious tradition, Vodou is not for everybody, but many find its practice to be deeply positive and uplifting. Ceremonies are full of song and dance in praise of God and the lwa. It is really nothing like what you see in the films!
Original source: http://www.baronsmagic.co.uk/index.php?main_page=page&id=25