In this passage we have two striking examples of subjunctive usage in the Book of Mormon text (“that he be their God” and “that he be crucified”). These verb forms have never been edited to the indicative. A similar example is found in Helaman 9:2 (“that he be dead”). Of course, the critical text will maintain such examples of the subjunctive. For further discussion, see mood in volume 3.
Summary: Maintain the subjunctive in the phrase “that he be” found in 2 Nephi 10:4, 2 Nephi 10:5, and Helaman 9:2.