No Jew is required to keep the law. My question to such people is WHY are they keeping the law? for what purpose?
Moreover, if they are going to keep the law, they have to keep the WHOLE law and not just some of it. In other words, the sacrifices instituted UNDER the law must also be kept. Now, I don't think any christian would wanna be sacrificing today when already the perfect sacrifice (Jesus) has been offered for us.
I believe Paul fought tooth and nail against Jews being required to keep the law.
Rom 7
1 Know ye not, brethren, (for I speak to them that know the law,)
how that the law hath dominion over a man as long as he liveth?
2 For the woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband.
3
So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.
4
Wherefore, my brethren, ye also are become dead to the law by the body of Christ;
that ye should be married to another, even to him who is raised from the dead, that we should bring forth fruit unto God.
We are DEAD to the law and MARRIED to Christ.