Ultimately it is not about Dave's members fearing God. They are to fear him. Given his abysmal track record of spiritual abusing members, there may be a great excuse to fear Davey. All of this great reunification event apparently is to happen in ONE day. Good luck with that one! Even Davey's god can't pull that off.
The best place to start is a simple review of a key portion in Haggai: “…ALL the remnant of the people, obeyed the voice of the Lord their God, and the words of Haggai the prophet, as the Lord their God had sent him, and the people did fear before the Lord. Then spoke Haggai the Lord’s messenger in the Lord’s message unto the people, saying, I am with you, says the Lord. And the Lord stirred up the spirit of Zerubbabel…and the spirit of Joshua…and the spirit of ALL the remnant of the people; and they came and did work in the house of the Lord [God’s Church] of hosts, their God, in the four and twentieth day of the sixth month…” (1:12-15).
The Hebrew for obeyed (shama) means “to hear intelligently (often with implication of attention): consider, diligently, discern, give ear, listen, (be) obedient, obey, perceive, regard, understand.” The context shows the remnant finally begins to hear God after decades of ignoring Him. Verse 12 describes the remnant as “fearing” God. This is not speaking primarily about the “fear of God.” Let’s see this. The Hebrew for fear means “to fear; to revere; to frighten: dread (-ful).” The word before is better translated “because of.” God does something that frightens the remnant and causes them to listen. Whatever this trauma is—you will learn it momentarily!—the people finally start listening to God. Thousands today who have God’s Spirit are NOT listening to Him. They are NOT “considering their ways” (Hag. 1:5, 7)—doctrines, standards, traditions, behavior, etc.
Haggai 1:14 also reveals the FIRST culminating event that occurs. GOD’S SPIRIT stirs His people to act, alongside a second culminating event that we will cover momentarily. The Hebrew for “stirred” in Haggai 1:14 means “(through the idea of opening the eyes); to wake: lift up, raise up, stir up.” This stirring is what causes all of God’s people to return from their “houses” to work again in GOD’S House. And notice the Scripture describes it culminating in a single day. God, through His Spirit, reassures His people that “I am with you” (in this case, back with them)—and to “fear not” in the human sense of fear—after He had previously removed them from His Church and held back blessings from their groups. Terribly frightened from what they saw, God now calms them so they can go forward in peace to fulfill His purpose.