Myself, I think the key is here
Romans 14:5 One man esteems one day as more important. Another esteems every day alike. Let each man be fully assured in his own mind. 6 He who observes the day, observes it to the Lord; and he who does not observe the day, to the Lord he does not observe it. He who eats, eats to the Lord, for he gives God thanks. He who doesn't eat, to the Lord he doesn't eat, and gives God thanks.
I definitely fall into the "all days alike" category, and I eat beef with the fat (unclean, I believe).
I believe the entire law (including the 10) is fulfilled by loving one's neighbor as oneself. If someone else wants to follow certain laws, that's fine. I've given up (hopefully) trying to get other people to live like I do (which I used to do a lot ).