"Men’s hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken." Luke 21:26
Jesus Christ explained the dire circumstances that would exist befire His second coming in glory. Why will men's hearts fail? Why will some turn away from the truth during the Tribulation? Maybe it's not just because hard times of the Tribulation but also because God's own kingdom is also shaken up.
Apostles and Prophets say a test is coming for LDS members. I think when nuclear war comes with Russia and China vs. the West, I wouldn't be surprised if voices arose questioning why the LDS people weren't specifically warned ahead of time.
President Monson addressed this concern in a talk entitled "Are we prepared". Food and water storage is the best defense for war. Also, President Monson gave a parable of lighting fires putting chickens in a molt.
Also, LDS Apostles and Prophets warned in 1995 that the degredation of family values would bring upon nations the "calamities foretold by ancient and modern prophets". I have written before how Russia, China, and Muslim extremists continually use the immorality of the West as a justification for their actions. Our immorality degrades our moral authority and emboldens evil.
Also, if you expect a modern prophet to tell you the day before that such-and-such is about to occur. What could you do more than how every Latter-day Saint has already been instructed to do with regard to storage of food and water and fleeing to the Stakes of Zion for refuge. Maybe this period of relative silence is foretold in Revelation and Jericho and represents Christ's silence at His trial. (so he opened not His mouth).
On the other hand. Some LDS are awake and seeing the events unfold in the world, could these hearts fail by being tempted go beyond the mark such that they feel they can go it alone without the Church and choose not to flee to the Stakes of Zion at the needed time?