The problem is when something positive happens we have no problem giving credit to religion. When something negative happens the standard answer is we are not capable of understanding. Can't have it both ways.
One of the basic tenets of Judaism is Divine Providence. If you believe in Dvine Providence, then you believe that everything that happens, good or bad, is in the hands of G-D.
It's very easy [for someone who is religious, or someone who is "on the fence"] to believe in Divine Providence when positive things happen. When negative things happen, those who believe will accept that they cannot understand the ways of G-D, while those who don't believe [or those who are on the fence] will simply mock religion.
For the record, when Dan posted the story of the guy who was saved from MH370 because he observed the Shabbos, there were many comments mocking the story.
Point is, if you don't believe, you don't believe. Heck, some Jews who witnessed Krias Yam Suf also didn't believe.