No it's not. I laugh at a lot of non-PC things as long as it doesn't actually involve harming anyone, but you're laughing at the miserable and undignified death of a sick woman.
If you can't see the difference, that's your problem, but I know kids who wouldn't find it funny.
No, some things are simply not funny at all.
that's because kids would look at it in black and white like you all are! You can just imagine something like this in an episode of Little Britain (bad example because I hate that), but you can see this as a comedy sketch of some sort.