I don't think all NTs are like this, but I've seen similar things many many times (people laughing at or making fun of someone else's suffering). I think this is due to the fact that people are being brought up in such an individualist way that they don't care about the others. It's just "me", "me", "me"...
Then, when such a thing happens, all they do is to laugh or to make jokes. I'd call it lack of empathy somehow, in the sense that they don't "learn" it at home.
And when we see these things we find out that it's ironic when some psychiatrists say that we aspies don't have empathy.
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Your Aspie score: 161 of 200
Your neurotypical (non-autistic) score: 45 of 200
You are very likely an Aspie
"A man is as free as he chooses to make himself, never an atom freer"