It's a word you use when you want to signal to everyone that you'd like to cease having a polite discussion and turn it into a battle of ideologues, very commonly initiated by those who lack introspective processes that fuel the political narrative that they pretend to demonstrate against.

When someone's inner monologue is so full of derisive irrationality that buzzwords pushed with an agenda are the first "opinions" they share, its somewhat of a moot point to engage with them as the point of their post wasn't about having a civil discussion. I generally consider it an indirect act of kindness when people like this immediately show their cards, because it's pretty easy to spot and ignore (if the loud sound of their mouth breathing doesn't already give it away).