One aspect we shouldn't overlook is stratification by intelligence. People of very different IQs have trouble communicating. So, "hateful repetition of populist punchlines" is a natural form of communication for average-intelligence people - to say nothing of below-average.

Now, the loudest, most visible fraction of any political group tends to be the stupid.

So your conversational Utopia needs some kind of poll-test at the entrance.

I think that an educated gentleman of 150 years ago wouldn't be annoyed at the ignorant opinions of a servant, because they were of two different worlds. Today with the spread of literacy and erosion of class distinction, these different levels of discourse are forced together.