In many cases Jesus actually strengthened the law, by for example saying in the case of adultery that to even “looks” at a woman in a lustful manner has already committed adultery.
Peoples failure to follow the law in it's entirety does not change the law. The law is the law, and the law is there mostly for our benefit.
Do you really think God cares what we eat? or how what we eat is prepared for cooking? of course not! but in the ancient world they didn't have the USDA approved label that food had been prepared properly to not make people sick.
How does it benefit God if we take a day off of work each week? (I know, some would argue that if we use that day off to glorify him then it has some direct impact on him) But I would argue that the Sabbath was made for us. Our maker made us to sleep every night as to rest every 7th day. To do otherwise is only hurting ourselves, those who never take a day off, or who rest all the time, get ill and die early.
Heck, one could even argue that the old testament admonition for men to not shave is important. Men shouldn't emasculate themselves and act like women. Basically God didn't think it was a good thing for men to act like metrosexuals.
I could go on and on.
There's nothing there about pork, even by implication. I think you're probably thinking of Peter's vision of the sheet full of unclean animals, which is in Chapter 10.
I’m sure you could. But you seem to leave it up to your own judgment which laws still apply and which don’t.
Which was pretty much my point. A law is only meaningful if you obey it when it isn’t convenient to you.
Here’s a very short list of Mosaic Laws that modern American violate routinely, with AFAIK no specific abrogation of them by Christ.
1. Don’t castrate animals. (Steers, dogs, cats, etc.)
2. All sex outside of marriage is prohibited.
3. A man cannot remarry his ex-wife, if she married another man in the meantime.
4. Not to leave the house or do any work at all on the Sabbath. (Admittedly, Christ did say specific things about Sabbath-keeping.)
5. Keep multiple religious holidays per the rules.
6. Don’t eat meat killed while hunting, or pork, shrimp, etc.
7. Not to till the ground in the 7th year.
8. Don’t wear garments of mixed fibers.
9. A menstruating women is unclean and defiles those with whom she comes in contact.
10. Special rules for raping women you capture in war. If you don’t decide to keep her as a wife, you have to free her. Her opinion on the matter not relevant.
When a Christian group, as I said, can show me they keep all these commandments, as well as the others, then I’ll take them seriously on the matter. Since they don’t, IMO their “observance of the law” consists solely of keeping (sort of) those commandments they find convenient, while ignoring the rest. This is largely an excuse to look down on those Christians who don’t keep the same list of convenient commandments.