Admittedly, Catholics are many times more myopic about their religion, but Protestants aren't immune from criticism here either. This ceremony is sick, twisted and its real meaning is ignored by the "faithful". Let's start with why Christians do it.
Mark chapter 14 says:
- And as they were eating, he took bread, and blessed, and broke it, and gave it to them, and said, "Take; this is my body." And he took a cup, and when he had given thanks he gave it to them, and they all drank of it. And he said to them, "This is my blood of the covenant, which is poured out for many.
And again in Luke chapter 22.
However, this gets even more graphic in John 6:53-55...
- So Jesus said to them, "Truly, truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you; he who eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day. For my flesh is food indeed, and my blood is drink indeed.
Now imagine you meet someone who has never heard about Christ. True, that would be kind of tough in today's world, but not impossible. You start talking about Jesus, and God. You tell them about how we are doomed without them and get them good and frightened.
The next thing you offer is a religious ceremony which will bring them closer to God. Then you tell them that you will truthfully (or symbolically, if you're Protestant) EAT THE FLESH OF OUR GOD AND DRINK HIS BLOOD, MUAHAHAHAHA!
Since when is cannibalism okay? It's gross even in movies, which all but the insane consider to be fiction, but Christians see it as one of their most holy, if not the most holy, ceremonies they could possibly ever partake in.
The Da Vinci Code offers two explanations of how this whole sick, twisted ceremony began:
"The vestiges of pagan religion in Christian symbology are undeniable. Egyptian sun disks became the halos of Catholic saints. Pictograms of Isis nursing her miraculously conceived son Horus became the blueprint for our modern images of the Virgin Mary nursing Baby Jesus. And virtually all the elements of the Catholic ritual - the miter, the altar, the doxology, and communion, the act of "God-eating" - were taken directly from earlier pagan mystery religions."
"Nothing in Christianity is original. The pre-Christian God Mithras - called the Son of God and the Light of the World - was born on December 25, died was buried in a rock tomb, and then resurrected in three days. By the way, December 25 is also the birthday or Osiris, Adonis, and Dionysus. The newborn Krishna was presented with gold, frankincense, and myrrh. Even Christianity's weekly holy day was stolen from the pagans."
Yes, The Da Vinci Code was a work of fiction, but Dan Brown did a lot of research to make the book as awesome as it is.
The moral of this story is that Christianity is not unique. It has been described as a big snowball that rolled over other religions and picked up their beliefs. So, as a Christian, you are wasting your time and contributing to the ignorance and superstition of our world.