I can't reply or even access my last post about the hyperdispensationalist idea that Body of Christ and the "circumcised" believers are separate entities. I've come to the conclusion that they are not separate entities, after months of picking the issue apart. But if you want the short-cut: The book of Hebrews was generally accepted to have been addressed to believing Jews (the circumcised believers of Gal 2:7), and Heb 13:3 confirms that those same believing Jews are indeed part of the Body. I have more to say on the topic, but for now I just wanted to correct my older post.
[Heb 13:3 NASB20] 3 Remember the prisoners, as though in prison with them, [and] those who are badly treated, since you yourselves also are in the body.
The word of God is alive and powerful, sharper than any two-edged sword, piercing even to the dividing asunder of the soul and the spirit, of the joints and marrow, and is a critic of the thoughts and intents of the heart.