You need to work on your bit. A joke is funny if it is:

• Unexpected and
• You should have seen it coming

Up-front bigotry isn't even a joke. Bigotry only seems like jokes when it's the punch line, because stereotypes take the place of setup for a joke to establish something that you should have seen coming. They take the place of a callback to something said earlier or a reference to shared experience.

Jokes that rely on the situation of bigotry being expected are difficult and require much more effort or insight than "[identity] lol". In other words: put your ass into your schtick.