Jeff Lindsay summarizes this wordplay:
The name Judah and the Jews, with Judah being related to Hebrew roots which can mean “to offer praise out of a feeling of gratitude” or to “praise,” “thank,” or “acknowledge.” In his chapter, “‘What They the Jews?,'” Bowen shows how Nephi applies these meanings as he urges the future Gentiles to grateful to the Jews for the scriptures they have preserved for the world and to resist the temptation to despise and persecute the Jews (2 Nephi 29:3-6). “What thank they the Jews?” in 2 Nephi 29:4, the Lord’s condemning question of future anti-Semitic Gentiles, appears to provide a direct word play between the words for “Jews” and “thank.” To say that the Jews have helped bring forth “salvation” to the Gentiles (also 2 Nephi 29:4) may also be a word play on the name of Jesus. Bowen also observes that Nephi’s closing words which call upon us to “respect the words of the Jews” (2 Nephi 33:14) further underscores the revealed message shared in 2 Nephi 29. Bowen also notes that the Book of Mormon offers the strongest condemnation of anti-Semitism found anywhere in the scriptures. How appropriate that it would be done with Hebraic wordplays.– Jeff Lindsay – Book of Mormon Nuggets
Would Joseph Smith have used a Hebrew wordplay to urge Gentiles to be grateful for the Jews?