I agree with GH (which doesn’t happen often). The way many Jewish people talk/joke about non-Jews in general, and especially minorities, is repulsive.
Good Jewish humor is self deprecating, and usually is based on Halachic or Minhag anomalies or (superficial) inconsistencies.
Jewish humor often has an element of morbidity, as in:
“What, Moshe, there were no graves in Egypt?”