In virtually every case where I have seen impolite issues filed or even abusive issues filed, the biggest success has always been when the project maintainers simply ignore the abuse and respond respectfully, as if the request had been worded more politely. The abusive issue opener will often apologize for their tone or simply adopt a different, much more friendly tone.

This is an effective strategy. In the same way that people filing issues need to remember that maintainers are people and should be treated as people, maintainers can also remember that people filing issues are people.

There's no need to act adversarially in open source software development.