The scriptures are very clear that the reason blood is to be abstained from is because the life of the creature whether it be a animal or human is in the blood of the creature and it has been put on the alter. This is the reason a person abstains from blood. These animal sacrifices where a foreshadow of the greater sacrifice to come which was Jesus Christ who came as a human so his human life was in his blood. The scriptures at Acts 15:28,29 tell us we are to abstain from necessary things such as abstaining from having anything to do with idols and it's necessary to abstain from all forms of sexual immorality, and so it's just as necessary to abstain from blood. The word used at Acts 15: 28,29 is abstain. This word means to refrain from a practice or Action. Let's take the example of an alcoholic the doctor tells the alcoholic he\she will die if he\she doesn't abstain from alcohol. Now let's say the alcoholic thinks he\she can take alcohol intravenously because that's not drinking alcohol. That would be seriously unreasonable, especially if the alcoholic actually did something like that since doing something like that would most likely kill him\her. Besides the alcoholic wouldn't be following his\her doctors advice when the doctor said to abstain from alcohol. The doctor meant when he\she said to abstain from alcohol to have nothing to do with putting alcohol into your body.
I don't eat blood. I'm an American of European descent. We just don't prepare meals of blood in our culture. Practically speaking, that's the main reason it's a non-issue for me personally. I just don't eat blood anyway!
Spiritually speaking, in the law we see the life blood of the sacrifice being poured out on the ground and not consumed. This is the sign that the covenant of law can not give life to the worshiper. The New Covenant is where the life blood of the Sacrifice is applied to the worshiper and gives life. This understanding comes to me from the example of the veil where the author of Hebrews says the prohibition to go behind the veil was symbolic of how you
can't go behind the veil in a covenant of law. And the attempt to do so would result in death. But in the New Covenant you
can go behind the veil, and not die. These illustrations in the law teach us spiritual realities and are not meant to be of practical, outward significance in and of themselves.
So you're probably wondering, "how can you just decide to apply the same kind of symbolism concerning the veil to the blood of the sacrifice?". And that's a good question. I can because the scriptures are very clear that the blood of the Sacrifice
IS allowed to be eaten in this New Covenant, and so the life blood of the Sacrifice goes into the worshiper. And so we understand this matter of eating blood in the same vein of symbolism as the matter of entering through the veil in the temple is understood symbolically.
This spiritual truth is very liberating, and my hope is that all believers would see it and be set free from the bondage of the symbols and enter into the joy and freedom of the knowledge of the truth that the symbols illustrate. But I'm not trying to make anyone do what their conscience won't allow them to do (assuming they eat blood in their culture). I'm explaining why I am not restrained by conscience to not eat blood (assuming I wanted to eat it). If someone can learn from this, good. If not, I'm fine with that too.