Um, not every human is the same it has nothing to do with going out more
And what's the bs about "Do you have any friends or family or anyone you care about that makes other people flesh and bone to you?" so just because they didn't feel anything at 9/11 they are heartless maniacs that would kill their own family? Get back to reality, most of them never been to the US or heard anything about the WTC. Hard to feel affected when you don't know anyone personally down there. And you know why? Because if I did cry back then I would have to cry every day or else I'd be a hypocrite. Each day more people die under inhuman conditions, earthquakes, civil wars etc.
And being not affected by such a tragedy doesn't mean that people do not care about life or justice. Personally I prefer when people stay calm, I bet you know why.......*war cough cough*
Stop judging people you don't know. I doubt that you are affected by everything that happens.