Of course, who knows more about stereotyping than a white guy in Mississippi?
This is why the irony mark would be a good thing. I'm honestly not sure if you meant the irony there or if you're truly oblivious...
It was a joke playing off the stereotype that white guys in Mississippi tend to have a lot of stereotypes against other races/cultures. I don't believe it to be true. I lived in Mississippi and while I don't much care for the state, it's stupid to think all (or even 80%) of the white dudes there are racists.