@Cookie Monster ...:) me 2.....
The spirit behind it, besides what you have said already is specified in Leviticus 17:
11 For the life of a creature is in the blood,and ****I have given it to you to make atonement for yourselves on the altar; it is the blood that makes atonement for one’s life.****
It is a symbol of what WAS and IS necessary for humanity to be at ONE (AT-ONE-MENT) with the creator. This pointed to the predestined "Lamb of God" and his death and resurrection that would enable God to restore humanity to himself on a higher level. Ephesians 1:4-10....The Eternal Life of God in Christ shared with humanity....1 John 5:9-12, 1 Corinthians 15:46
The destruction of the temple in 70 AD brought an end to the sacrificial system cult, and also the significence of blood.
The restrictions on Gentiles Acts15, coming into the Spiritual Israel of God aka Christianity, was merely for the "weakness" of the Jewish brethern's conscience in this regard. CT Russell was also of this opinion. As follows:
Until 1927, the Watchtower Society understood that Biblical laws against blood were not binding on Christians. Russell accepted the generally agreed theological understanding on this matter, including that the prohibition at Acts was not binding on Christians and was only observed in the first century to keep peace between Jews and Gentiles.
"He further suggested writing to them merely that they abstain from pollutions of idols, i.e., from meats offered to idols (verse 29), and from things strangled and from blood - as by eating such things they might become stumbling blocks to their Jewish brethren (See 1 Cor. 8:4-13)- and from fornication. ... It will be noticed that nothing is said about keeping the Ten Commandments, nor any part of the Jewish law. It was evidently taken for granted that having received the spirit of Christ thenew law of love would be a general regulation for them. The things mentioned were merely to guard against stumbling themselves or becoming-stumbling blocks to others." Watch Tower 1892 Nov 15 pp.350-351
As said previously...IF BLOOD IS SACRED BECAUSE IT SYMBOLIZES LIFE, WHEN DOES THE SYMBOL BECOME GREATER THAN THE REALITY OF LIFE ?
Shalom :)