If your best friend growing up is now a white supremacist, and for various reasons you want to keep being friends with them - maybe you're trying to talk them out of it, maybe you know they've got some deep personal trauma that you can help with and you want to be compassionate about that, whatever - I think there's a pretty good argument that that's your business. (To be clear, I think there's also a pretty good argument that you should ensure you're not effectively making them think that you support their positions or actions, though, but that's beside the immediate point.) There's good reasons to choose to be friends with them and that's your judgment.

If you link to their white supremacist writings, though, you're giving a platform and publicity to white supremacist writings. You're not amplifying or supporting them as a person: you're amplifying the messages they're communicating. And so the moral weight of that is in fact on you.

I think the article does do a pretty good job of talking mostly about views and not people, though it is obviously easiest to refer to views by the people who espouse them (especially in the case of personal blogs, which is what most of these are). The article is not trying to say that it's newsworthy that Sam Altman is best buddies with Elon Musk who married to Grimes who hangs out on a discord with Scott Alexander. The article is not trying to say that the NYT of the future will create simulations of Grimes just to cancel her.

The article is trying to say that, for instance, it's newsworthy that OpenAI is heavily influenced by Rationalist rhetoric about the urgency of building a friendly AI that implements your worldview, and that the worldview of this Rationalist community happens to be a worldview that gets an uncomfortable amount of support from white supremacists (and not just in the "We like this" sense, in the "This argument supports our argument" sense).