This is very true. I've seen this behavior everywhere:

She mentors early career academics, but the graduate students are not capable of producing scholarship. Instead they turn in “collections of woke slogans.” She says the students don’t even understand what she wants from them. “It seems like all they get in the schools is dogma. They have no real knowledge of anything – they just repeat slogans, and when you ask them to explain it, they turn blank.”

The instant a liberal is confronted with an idea he doesn't have a slogan for, his mind shuts down. He just stares blankly, or sometimes becomes angry and aggressive, or even begins to cry like a small child.