Sacrifice is sacrifice. At least the Druids didn't ritually EAT their sacrifice, willing or not.
So you're saying that according to the pagan view, there's absolutely no moral difference between a friend willingly flinging himself in front of a bullet, sacrificing his own life to save yours, and you choosing to throw your friend in front of that same bullet, sacrificing his life against his will to save your own?
If so, that just makes me even more grateful to be a Christian, whose God condemns human sacrifice, but who also said,
"Greater love has no one than this, than to lay down one's life for his friends. You are My friends if you do whatever I command you. No longer do I call you servants, for a servant does not know what his master is doing; but I have called you friends, for all things that I heard from My Father I have made known to you" (Jn. 15:13-15).As for the Lord's Supper, aka the Eucharist, if you actually understood what that's about, you would know that it is the (symbollic, IMHO, but opinions vary) act of taking Jesus Christ, the very person of God, and making Him a part of us just as we make ordinary bread and wine a part of us when we consume them. In no other act is the phrase more true, "You become what you eat."
See, the life of a true Christian is not just about acknowledging a few doctrines intellectually or following a handful of rules in order to get into a "heaven" of eternal sitting on clouds and strumming on harps. It's about being "conformed into the image of [God's] Son, that He might be the firstborn among many brothers" (Rom. 8:29).