There’s no “shouldn’t have” here. We can laugh at these things. This was a joke about how badly JKR writes foreigners, not a joke about the race it depicts.
There are good and bad jokes about racial stereotypes. Are we making fun of Mexicans or are we making fun of racist peoples’ stereotypes about Mexicans? I’d argue this joke was the latter.
There’s no “shouldn’t have” here. We can laugh at these things. This was a joke about how badly JKR writes foreigners, not a joke about the race it depicts.
There are good and bad jokes about racial stereotypes. Are we making fun of Mexicans or are we making fun of racist peoples’ stereotypes about Mexicans? I’d argue this joke was the latter.