is a stereotypical joke, such as "all Asians are smart", an example of humor? if so what kind of humor would it classify as?

Humor is subjective, so for some people a statement like that could be considered as such. Going by that, if we are looking at this statement as a joke then it would be classified as humor with some racist undertones, but it really depends on the context. That aside, I would say it’s racist because it can be used to generalize Asians in a hurtful way.

Fill with evil is the answer