I wouldn't call it failure to understand or laughing at another's pain, but I see it more as being exasperated by the fact that you have pain in the first place.
The generations before you were in a tough mindset after the death of another person...or seeing their friends blown apart. To see the effects of death and destruction right in front of them.... To see people dying...
As opposed to this generation which it appears is in the same mental place, but instead of death and destruction, it is from them not getting their own way. The election didn't have the outcome you wanted. People are challenging your beliefs, and you lack the ability to stand up to those challenges. You're coming to the realization that you won't always get your way, and that is upsetting.
At least...that's what it appears to be from this angle.
~Jeordam
Your angle is too narrow, it appears. I live and work in a college campus, and I know what students are reacting to is their friends suddenly facing the possibility of being deported, or the possibility that the moment they leave the country, for a conference, or because their mother is ill, they cannot come back because entry from their country to the US has been banned. The pain comes from seeing your female friends worry about what it means that a man who was known to boast about his ability to grab their genitals due to his celebrity can now control things like their access to contraception.
Where you sit, I know most of these things don't register at all, or, if they do, you don't see it as a problem. But you might try to imagine what it must feel like to see a demagogue take power and threaten core pillars of the world you live in. You may disagree he is a demagogue. You may be pleased by his actions. But others genuinely disagree, and finding amusement in their pain, or dismissing it, seems rather small and petty.