I am always leery when someone says definitively that “this or that” tragedy was because of a) toeiva b) lack of women’s tznius (my personal favorite) c) loshon hara etc. None of us is privy to Hashem’s reasons for anything that occurs in the world. While the Dor Hamabul clearly was deserving of its fate, the one family who were not reshaim WERE saved.
Here, people, GOOD people, frum Yidden were indiscriminately horribly damaged in the superstorm along with those who possibly might have been deserving of punishment for whatever… it is not up to us to speculate. Innocent children were murdered in Connecticut, brave staff members, one who threw her body over the children trying in vain to save them, were butchered. This shooting was the act of a deranged person. And while Hashem ALLOWED it to happen, I cannot imagine that He would WANT it to happen.
I believe that people (rabbanim and laypersons alike)have the right to express their opinion as to why a particular tragedy befalls us. But I also believe that unless they are blessed with some nevuah to which none of the rest of us has access, that they should be careful not to ascribe a certainty to that opinion. Only Hashem knows for sure.