am just reading some of the comments and made me think about it.. what is a joke after all?
according to encyclopedia:

it is a humorous anecdote or remark intended to provoke laughter.

yeah., just to provoke laughter only and no intention of hurting or offending people. Sometimes we should separate the word differently. I do not say that jokes are for broadminded people only, but things should not be taken seriously. Afterall, it is not meant to really hurt or offend anyone or any races.

Jokes are jokes.

Live and let live.