Whenever I come across something like this, I just remind myself that with 7 billion people in the world, there's ALWAYS going to be someone who says something inappropriate. Take any issue in the world and any tragedy -- there will always be people willing to say stupid and insensitive things about it. Sometimes they are just ignorant, sometimes they are using bravado to mask their own pain, sometimes they just want attention. I find that unless it is someone who you can actually have an honest conversation with and ask them why they feel that way, its best to just not pay attention to it in the first place.
"As long as the child within is not allowed to become aware of what happened to him or her, a part of his or her emotional life will remain frozen . . . all appeals to love, solidarity, and compassion will be useless."
-- Alice Miller