That's called 'shooting the messenger'. It is not a good idea for those who want to be open to different opinions, a fact which actually can be gleaned from the linked article. If, as you say, 'everyone flags it as spam' it would be good for 'everyone' to read the linked article. That does not mean you need to agree to everything written there, by all means disagree but do so on the base of reason.

> Eschew flamebait. Don't introduce flamewar topics unless you have something genuinely new to say. Avoid unrelated controversies and generic tangents.

https://news.ycombinator.com/newsguidelines.html

How can you discuss neo-Nazism or black supremacy without knowing what those terms actually mean? Again, this is once of the themes of the linked article: placing labels is not the same as understanding an issue. Reading about subjects you disagree with makes you a more knowledgeable and possibly even wiser person. It does not make you into whatever it was you read about.

I think the author confuses reason with common sense anyways. They're not the same thing.

That's... rather poor behaviour on your part, no?