I suppose ethnic jokes in particular are sensitive in some quarters. Years ago, before there was an Internet, there were newsgroups ( and I suppose there still are ). A computer scientist recommended that ethnic jokes be genericized, by using the term <Ethnic> in place of a specific term for someone's ethnicity. The claim was made that you could not construct a joke using a real ethnic name that would have a different meaning than the same joke using the generic term. In other words, all ethnic jokes were generic, so no one could be offended.
Then a mathematician constructed a counterexample. The details of the are unimportant, but the punchline, which only a mathematician or engineer could appreciate, was "any system is unstable when all the Poles are in the right half-plane".
The Texas Aggies, of course, have laughed at Aggie jokes all the way to the bank. That's because they're not jokes, but true stories .