God rarely infringes on the agency of any of His children by intervening against some for the relief of others. But He does ease the burdens of our afflictions and strengthen us to bear them, as He did for Alma’s people in the land of Helam (see Mosiah 24:13–15). He does not prevent all disasters, but He does answer our prayers to turn them aside, as He did with the uniquely powerful cyclone that threatened to prevent the dedication of the temple in Fiji; or He does blunt their effects, as He did with the terrorist bombing that took so many lives in the Brussels airport but only injured our four missionaries.
-Elder Dallin H. Oaks, Opposition In All Things, April 2016 General Conference
Because Elder Oaks is an Apostle and a man I’ve sustained as a prophet, seer, and revelator, I’m going to believe him here. I’d like to talk about how God answers our prayers to turn aside disasters, that God turned aside a cyclone to facilitate the temple dedication in Fiji, and that God intervened in the Brussels bombing to preserve the lives of four missionaries. I would argue that if any human being can know whether or not God was involved in those events, that human would be a prophet, seer, and revelator. Here, a man I sustain as such has stated his belief that this is exactly what God has done. Who am I to say otherwise? Elder Oaks would definitely know better than me — and I don’t mean that as a tongue-in-cheek expression, simply that if people we sustain as prophets don’t actually know when God is at work, then I’m not sure anyone does.
Further, if God is working His hand among us, if He is intervening in natural disasters and horrible atrocities, then He is doing today what He has done throughout history. The Bible tells us so, as does the Book of Mormon. God spares His messengers many times in scripture — can He not do so today at an airport in Belgium?
Preaching an interventionist God should not be an offensive thing for a Christian to do. We believe in miracles, and there’s no shame in that belief.
However: it is problematic that God spares the lives of missionaries but not these people. It is problematic that 44 people died and thousands and thousands had their homes devastated, but God made sure the temple building was ok. In other words, it’s not the sparing of good people and good buildings that is the problem; it is the loss of other good people and good buildings. We are led to ask, why did God act as He did? We start to make assumptions about why He acts this way. Missionaries are saved and temples are preserved because God favors them (note, however, that Elder Oaks begins by emphasizing how rare this sort of divine intervention is). A central difficulty: this is something that scripture teaches us, that God preserves His servants, protects His holy ground. Elder Oaks is saying what prophets have always said. For the faithful, sensibilities about the value of all life must be reconciled with the knowledge that God does intervene in human events, but that He does not always do so and that His ways are fundamentally mysterious.
 Note, however, that scripture also teaches us that prophets are martyred, that temples are destroyed, that all is vanity and that the only surety we can have in this life is in the love of God. So, YMMV.