According to Miss Manners, (Judith Martin in the WP), the only people who can make jokes about a certain group are members of that group. Hence, you have Eddie Murphy making jokes about blacks, Jeff Foxworthy making jokes about rednecks, etc.. What is taboo, is to make jokes about a group to which you don’t belong.
I'm a mongrel. Therefore, I can joke about any group, ethnic or not.
Me, I tell people I’m Cherokee Norwegian (don’t know all of my backgrounds), so I can tell ethnic jokes.
I love ethnic jokes. But, then, I love all people, too.
We all just need to lighten up a bit, and enjoy our quirks.