My point is that this is a general issue in politics
That's kinda a general issue in humans and usually goes by the name of Confirmation Bias.
For example, debates about religion or, say, global warming work in exactly the same way.
But I don't think it's just confirmation bias. People do get won over by arguments. People do change their minds, convert, etc. And often after changing their mind they become just as passionate for their new cause as they ever were for the old. But what is persuasive and what is logical sometimes seem disjoint to different people.
You are right that these things afflict some areas more than others. Politics and religion are notoriously bad. And I do think a large part of it is that people simply have very different standards for what a successful argument looks like, and that this is almost an aesthetic.
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