I know a comedian who is very good on absurdity. He's been doing that for ages (he kind of popularized it in my country), and he generally attracts right-wingers. I don't appreciate all his humor, as in I don't find it all funny because the goal seems to be to shock (kind of like Goatse, which was also a joke/meme riddled with a political message). I do find it political and humor though, as I can clearly see the intent is (at least also) to humor, and also can recognize political virtue signaling within. I've also found him, at times, funny.

Whether something is humor can be objectively established by disassembly of the structure of the content, whereas 'if you find it funny' is personal, yet 'if it is funny' is a summary of whether a certain group (such as 'the general public', whatever that may be) find it as such.

As such, I believe the expression of not finding someone or something funny a red herring. Different emotions obviously flourish, and the person who expresses that they don't find it funny finds these (more) important.

The red herring here isn't whether The Onion is funny or not (personal), it isn't whether it is humor or not (it is, specifically satire). It is that you fundamentally disagree with the political message it entails. Which you are allowed to do so, but in a discussion it is useful to recognize a significant amount of people do find it funny, and either have no problem with the political messages (tolerance) or agree with these (acceptance).