Unfortunately, you've got it backwards. The propaganda has exacerbated the division, almost in direct alignment with the removal of the fairness doctrine. All of the things you're describing are a consequence of growing up thinking that 'opposing views' are somehow validated and the problem is that people aren't listening.
It's true, they aren't listening to each other; But few people are saying anything worth listening to ( for example, having critical thoughts about ANY subject that isn't a regurgitation of talking points they heard/read/saw from their bubble ).
The propaganda has been successful enough that it's created a cultural viewpoint that starts with the premise that there ARE sides and that the other side won't listen so they're hopeless.
It's true, they aren't listening to each other; But few people are saying anything worth listening to ( for example, having critical thoughts about ANY subject that isn't a regurgitation of talking points they heard/read/saw from their bubble ).
The propaganda has been successful enough that it's created a cultural viewpoint that starts with the premise that there ARE sides and that the other side won't listen so they're hopeless.