In the context of the comment you're defending, it isn't clear whether it is a joke.
Also, making such "jokes" in contexts like these, still carry a hateful message. If you don't mean it and don't want to shit on people like that, then simply don't do it. It doesn't get better to defend it as a "joke" as it is not clear what the true intentions are. As such "jokes" can also form opinions / views about some topic, it is reckless not to mind the hazards created by such "jokes". Furthermore, stuff like this is often seen in Motte-and-bailey fallacies.
What's next? Laughing about all the Jews who were gased by Nazis? Or all the vicitims in Ukraine who get fucked in the ass by Russia?