The promise granted to the returning tribes is that “their enemies shall become a prey unto them” (D&C 133:28). This is a reference to the destruction of the wicked (the enemies of God) at the time of the Second Coming. Speculative theories of various and sundry peoples going forth with a divine decree to destroy the wicked and faithless are without scriptural foundation. (See also 3 Nephi 16:13-15; 3 Nephi 20:15-21; 3 Nephi 21:12-21.)
Further, Nephi prophesied that the mother of abominations would gather great multitudes “upon the face of all the earth, among all the nations of the Gentiles, to fight against the Lamb of God” (1 Nephi 14:13-15) and that the wrath of God would be poured our upon the great “whore of all the earth,” who would then “war among themselves, and the sword of their own hands” would “fall upon their own heads, and they shall be drunken with their own blood.
And every nation which shall war against thee, O house of Israel, shall be turned one against another, and they shall fall into the pit which they digged to ensnare the people of the Lord.” (1 Nephi 22:13-14.)
How fitting that those thirsting for the blood of the Saints will eventually turn upon their own in that same spirit of vengeance!