The blood...

One thing that has always fascinated me is Gods pre-occupation with blood. I've always had difficulty putting it in a perspective that makes some sense. There's hundreds of books written on the subject and some of those make people like me feel pretty dumb because I have a question or two about it. I'm not talking about the theological reasoning behind it. That makes perfect sense. It's the pre-supposition that comes with it, with other words, the blood was there before theology, before Jesus, before Israel, before Abraham...
My question is this. If God is God why does He need to see blood in order for us not to come under His judgement?

I know it is linked to the Exodus. The night before the Exodus the Jews are having some family quality time while disaster happens outside their doors; God is killing all the firstborn sons in Egypt households that don't have the blood of an innocent lamb smeared on the doorposts.
Those that obediently killed the lamb, and applied the blood to the doorpost, are saved from Gods judgement.

Why not a red hanky? Or a yellow ribbon? It's the faith that matters, doesn't it? Or am I missing the obvious here?

Why did I get to this blog?

I am re-reading Watchman Nee's 'Normal Christian Life' and this thought struck me: The blood was, and is enough for God. We, humans, worry about the question whether the blood is enough for us. But, Nee, rightfully says, the blood was and is for God to see. I only need tot trust in its power.

So, you see, I understand how it works. But, the question remains, why blood?
Because it is a disgusting thing to take innocent lives and have someone or something else bear my shit? Maybe. Could be.

Some will say that it has to do with Cain and Abel but I don't buy that. Kain supposedly was the loser because he didn't understand that God wanted blood, and not brocolly. Please, give me a break...

So what is it. What do you think? I'm asking because I really don't know.