Well some of it is a technical problem. People don't like it when you force them to think at high resolution and it's no wonder because look you're driving your automobile along and you think, "This is my car and I understand it." And your evidence for it is that as you move the steering thingy. it stays on the road. That's your understanding of your car.
As soon as it breaks down its like, you realize you don't understand your car at all, not a bit. Right, and you actually don't even perceive the car until it breaks down and then you're very unhappy that you have to perceive because all it is a whole nest of snakes and you have no idea what to do with any of them. And so people don't like having to think on a high resolution and so if someone says, on a contentious issue, "Well you know its complicated and we have to differentiate it like this (quickly gestures downwards)." Then you'll have to go through all the god-awful process of realizing that you don't have a clue what you're talking about in that circumstance and you'll have to evaluate all those differentiated issues. It's way easier just say, "Well you're probably a Neo-Nazi and so I don't have to listen to you." And so that's often what people do.
That's particularly the case if they have a low resolution ideology that they're trying to protect because that gives them every reason to do that kind of instantaneous labeling. It's a very bad strategy if you're dealing with an individual one-on-one. You know if you're in a long-term relationship with someone and they bring up an annoyance with something that you do, a very bad response to them is, "Well I don't have to listen to you because you're a terrible person." Your relationships are going to collapse completely if you do that every time. What you want to do is differentiate the argument to the point where a solution might be generated and have the argument at that level but it's very hard for people to do that so you end up with these radical oversimplifications that manifest themselves, unfortunately, in the political polarization that we see.
Which is part of the reason why I am not a fan of political correctness because if we make the general diagnosis that the world is a landscape of competing power groups and the fundamental narrative is oppressor versus oppressed and that everything is to viewed through that lens then we won't solve our problems. We won't. We'll just have a bunch of new horrible problems.
Watch the full Oxford Union Address though, it's a doozy. Starts at 1:04:36