You know that how, exactly? We just saw that in Acts 15 the Church, guided by God, abolished the kashrut. What makes you think the same Church cannot abolish also prohibition on eating blood?
” We just saw that in Acts 15 the Church, guided by God, abolished the kashrut.”
Actually..No. The Law (with its dietary restrictions) was fulfilled with Christ’s death as he said he came not to abolish but to fulfill and did so.
What took place in Acts 15 was a decision made with authority of the apostles behind it and recorded in the Scriptures.
What is recorded at Acts 15:21 is the ‘bare bones’ principles of the Law that that Gentiles were bound by upon becoming Christians.
The Scriptures note no removal of the prohibitions. In fact the restriction on eating blood was a age old one that the apostles and older men simply continued guided by holy spirit.