One thing that helped me was reading a book on good political discourse. It basically said what the GP said, that good discourse is about exploring the world. It also pointed out that vilification in its many forms is counterproductive. It undermines trust.

One of the examples used was of a party that I did not agree with - that most people didn't agree with. You'd see mainstream politicians declaring them to be bad people.

But the book pointed out that before this party existed, nobody was representing the people who were now voting for it. If you believe in democracy, how can you be disrespectful of representation?

Suppressing my value judgement also later helped me see that when the party got into a coalition and managed to get some of their politics put into law, some of those laws actually did help the rest of us, because they addressed issues that the other parties were not willing to address.