From early on, we learn not to make fun of others in a way that is hurtful and demeaning to them. Polite people don’t make fun of others’ physical and mental infirmities, for example. Jokes about mentally retarded people are the sign of a cad, not a bon vivant.
We also learn that jokes directed against some groups of people — like racial and religious minorities — can be especially harmful because of the discrimination, stigma and even violence the members of these groups have historically faced. Jokes at the expense of other groups of people — like politicians or lawyers — don’t raise the same kinds of concerns because the targets of the fun aren’t disadvantaged.
Jokes are often funny when they rely on some generalization about members of the group — some trait or characteristic they are widely believed to share, whether true or not. But this same reliance on stereotypes can reinforce prejudice. And prejudice is the first step toward harmful discrimination.
What’s acceptable when it comes to gay people? Very few of us would take the extreme position that it’s never acceptable for anyone ever to tell a joke of any kind about gays. Even the media watchdog group, the Gay & Lesbian Alliance Against Defamation (GLAAD), is not so humorless.
Jokes about gays are not necessarily objectionable simply because they exploit some kinds of stereotypes about gays. Think of the stereotype of gay men as promiscuous, effeminate and obsessed with couture and entertainment. Those stereotypes were the basis for much of the humor in “Will & Grace,” which was a breakthrough triumph for the equal treatment of homosexuals on television.
http://www.washblade.com/2008/5-9/view/columns/12568.cfm