It makes Christians look stupid, naive, and gullible.
One question I have for End-Times junkies is this: Is our passion for the end of the world based upon our perception that Christianity is doing poorly in our locale? Christianity is indeed being further marginalised culturally and politically in what was once terra firma for Christians: North America and Europe. But it is doing quite well elsewhere, and it is a pitiful arrogance that leads us to think that because things are not as they were, we are at the end of time.
The Gospel is doing well. The harvest is not finished. Our world is shaken, but it is not the end of the world.
Now, after this introduction, I recommend this article. Let us suppose that the Ark of the Covenant is known and revealed. In light of Christ, the New Testament, especially the Gospels, Romans, Galatians, and Hebrews, how can this matter at all?
Sad thing is, it will matter much to the likes of Grant Jeffrey and other pop media stars in the Christian galaxy.