My impression of the lefty-loonies is that their whole intellectual equipment is a rag-bag of bogeys and shibboleths which constitutes their worldview. It is unassailably right. It has always been right. When circumstances force them to change how they apply their narrative, they assert that it is still right, and has always been right.
Truth to tell, there are people on the other end of the spectrum who are just as ill-informed and willing to argue endlessly based on their own collection of pre-packaged ignorance. I know where they lurk, and I avoid them as much as possible. Unfortunately, my interests and professional associations keep bringing me into contact with the first set of crazoids. And before you know it, I've succumbed to the temptation to contribute to the conversation.
I need to remember, first,
He who meddles in a quarrel not his ownand, second,
is like one who takes a passing dog by the ears. (Prov. 26:17)
Never wrassle with a pig;
ya both gits all dirty, and the pig likes it. (Traditional)