I have always thought that psychological explanations for the result reveal the baked-in normative Enlightenment-era belief that all people would sign on to whatever has currency in Western culture, if only they were not uneducated tools. That approach is unhelpful and self-defeating.
If you're seeing people vote for fascism, what they want is change. Reality is that center-left policies aren't producing results for a lot of people in the era of globalization. We can't rewind the clock, and a lot of voters who have been hurt financially can't see that. I just think that treating them as either irrational or 'victims of human cognitive limitations' makes matters worse, rather than better. IMO it reveals a lack of empathy.
If we're seeing a 25% share of parliamentary seats go to a far right party in a PR system, that should be a strong signal that we need to have a conversation. That conversation needs to start from the perspective that whatever concerns motivated these people to vote for extremism are legitimate. We need to accept their rage, rather than belittle it, and discuss how we make their lives better collectively.