On to the subject at hand, I do think the shedding of His Blood is quite a bit different than the fetid business of hawing his foreskin. For God's sake, I feel like hurling just writing that sentence!
"Take this cup, and drink of it, for this is my Blood." The shedding of Christ's Blood, that is, the Blood itself is very significant, in and of itself, though I do agree that it was His Death that was redemptive.
Revelation 5:9
And they sung a new song, saying,
Thou art worthy to take the book,
and to open the seals thereof:
for thou wast slain, and hast redeemed us to God by thy blood
out of every kindred, and tongue, and people, and nation;
LOLOLOL!!! The funniest part of that sentence is imagining your face as you typed it. >8~(
Here's more than you want to know from an encyclopedia...
And here's Ian Paisley's take on all of it.
The relevancy of all this information is to remind us that the body passes away; and what remains and what matters is spirit.