What is the meaning of Acts 21:20?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

When they heard this, they glorified God. Then they said to Paul, “You see, brother, how many thousands of Jews have believed, and all of them are zealous for the law.

Berean Standard Bible (BSB)

They, when they heard it, glorified God. They said to him, “You see, brother, how many thousands there are among the Jews of those who have believed, and they are all zealous for the law.

World English Bible (WEB)

And{G1161} when they heard{G191}{(G5660)} it, they glorified{G1392}{(G5707)} the Lord{G2962}, and{G5037} said{G2036}{(G5627)} unto him{G846}, Thou seest{G2334}{(G5719)}, brother{G80}, how many{G4214} thousands{G3461} of Jews{G2453} there are{G1526}{(G5748)} which{G3588} believe{G4100}{(G5761)}; and{G2532} they are{G5225}{(G5719)} all{G3956} zealous{G2207} of the law{G3551}:

Strong's King James

(20) Hearing this, they praised The אֱלֹהִים Elohim-God and said to him, "Brother, look how many 1,000's are among the Judeans who believe and are passionate about The Torah!

The F.O.G*

[20] The leaders glorified God upon hearing this report, but then addressed a pressing concern: "Brother, you see how many thousands of Jews have believed, all of them zealous for the Law.

The F.O.G Paraphrase

and they having heard, were glorifying the Lord. They said also to him, ‘Thou seest, brother, how many myriads there are of Jews who have believed, and all are zealous of the law,

Young's Literal Translation