No, I'd say somewhere with in you, you agree with what is being said. Or not brave enough to tell them they are just mean.
Not everything funny hold humor. No humor in meanness.
No you are wise and experienced and know that they can be as mean as they like because the person they hurt most is themselves :)
Cynical is not the correct term.
Sadist, possibly. Schadenfreude, more likely.
The higher the mountain, the deeper the valley... ;)
A lot of people do that. Some people that laugh at things like that aren't even cruel people. You can't control what you think is funny.