I don't think it's an 'overwhelmingly vast number' at all. Mr. Rogers, that dear man from the children's show, was asked how to help children through things like this. Mr. Rogers' advice for children was, "watch all the people who flood in to help". Focus on watching the good people who come out to help. From the beginning of this, there was an overwhelming outpouring of help from the community. At first bringing supplies for the first responders, and then when allowed to search they came out in numbers. MOST people are loving and giving. This is the work of one evil perp, and then an outpouring of community love and support.
Focus on those who rush in to help. Words to live by.