Welcome to the Internet. Signal the joke clearly so that you are not confused with stupid extremists. Joke's still there, and it's clear and unambiguous.

https://en.m.wikipedia.org/wiki/Poe's_law

Poe's law is an adage of internet culture which says that, without a clear indicator of the author's intent, any parodic or sarcastic expression of extreme views can be mistaken by some readers for a sincere expression of those views.[1][2][3] The law is frequently exploited by individuals who share genuine extremist views and, when faced with overwhelming criticism, deflect by insisting they were merely being satirical.