I would expect any Jew to be zealous for the law after they get born again. If you have ever known any saved Jews you'd see that they are very zealous for the law. Which is great. God bless 'em. But let's revisit the verse I gave you:
"15by abolishing in His flesh the enmity, which is the Law of commandments contained in ordinances, so that in Himself He might make the two into one new man" - Ephesians 2:15 " - Ephesians 2:15
This time the first half of the verse is highlighted.
In Christ, the law is no longer the hostile dividing wall between Jew and Gentile. There are no laws that Jews have to keep that gentiles don't have to. We can sit side by side in a Bible study and it would apply equally.