on the internet there is this thing called poe's law that states, due to the limitations of text communication, any joke can be misinterpreted as legitimate if the intent is not explicitly described. personally i think political jokes are most subject to this right now and it is entirely believable that you are laughing at a social justice caricature you think represents all liberals, disparaging many legitimate opinions with a throwaway comment while simultaneously demonstrating no knowledge of the subject.
basically if you talk stuff you should back it up