Harry Pi and his "Wealice" was funny!
It is a stretch to claim that jokes relating to accents or foreign customs is racism. I think this country's gone nuts on the subject of "racism." If you choose not to find differences between people humorous once in awhile, and instead you decide that all such jokes are "racist," then I think you have lost your ability to laugh.
Shit, we'll have to discard Shakespeare among others if we decide to be rigorous about eliminating jokes about accents, customs, etc. of different groups of people.