I do agree that context is key of course, and I don’t believe that Acts 15 contradicts Paul’s instructions. Actually I would say the opposite that Acts 15 speaks in favor of Paul’s instructions and I wouldn’t say that anything Paul wrote abrogated or “loosed” the teachings on eating the meat of strangled animals.
Let’s look at what Paul taught on the topic of eating food being offered in a way that was consistent with pagan practice:
1 Corin 8:7 However, not all possess this knowledge. But some, through former association with idols, eat food as really offered to an idol, and their conscience, being weak, is defiled. 8 Food will not commend us to God. We are no worse off if we do not eat, and no better off if we do. 9 But take care that this right of yours does not somehow become a stumbling block to the weak. 10 For if anyone sees you who have knowledge eating in an idol’s temple, will he not be encouraged, if his conscience is weak, to eat food offered to idols? 11 And so by your knowledge this weak person is destroyed, the brother for whom Christ died. 12 Thus, sinning against your brothers and wounding their conscience when it is weak, you sin against Christ. 13** Therefore, if food makes my brother stumble, I will never eat meat, lest I make my brother stumble.
**
You see here that the context of why we ought to abstain from foods is completely different than what we have been discussing. Paul in fact says that he would never eat meat if his brother would stumble.
1 Corin 10:27 If one of the unbelievers invites you to dinner and you are disposed to go, eat whatever is set before you without raising any question on the ground of conscience. 28 But if someone says to you, “This has been offered in sacrifice,” then do not eat it, for the sake of the one who informed you, and for the sake of conscience— 29 I do not mean your conscience, but his. For why should my liberty be determined by someone else’s conscience? 30 If I partake with thankfulness, why am I denounced because of that for which I give thanks?
Again, we ought to abstain from this meat for the conscience of our brother; which again is off topic from what we’re discussing. What you’re seeming to say is that at one point James taught that we ought to abstain and then Paul changed that teaching; which I don’t think is true at all. James taught that (with Paul present as you say) things should be
written to them that they should abstain from such things. Well indeed we have these writings, and the context of what James and Paul meant.
15:20 but should** write to them** to abstain from the things polluted by idols, and from sexual immorality, and from what has been strangled, and from blood.
All this said, it doesn’t change the fact that the Bible remains contextually true still today. So again, when Paul says that one may not look down on another in terms of eating certain foods or observing certain days; it still applies today. It applied 2000 years ago with the Jews, and Gentiles, but also applies today with Christians.
See Romans 14 as well: “As for the one who is weak in faith, welcome him, but not to quarrel over opinions. 2 One person believes he may eat anything, while the weak person eats only vegetables. 3 Let not the one who eats despise the one who abstains, and let not the one who abstains pass judgment on the one who eats, for God has welcomed him.”
And
5 One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind.
Again, Paul wants no one to quarrel or look down on others over days and foods, and this one is referring those in Rome. I’ve also pointed out that Paul saw his letters as Scripture and wanted them read in different Church’s and even condemned those who don’t.