So, I haven't read the linked article, I'm just going off from what you say here.
Hypothetically, say someone hates you, think you're a low life, that you're not as smart, and have bad habits, a trash culture, despise the way you dress and talk, and find your life choice repulsive, might even think you're tainted and doomed to eternal condemnation.
Now say you work with this person, but at work they pretend like none of it. They act normal and casual with you, and so they don't exhibit an active hostile environment.
Now say you found their online blog, where they basically reveal their sentiment about you. Lets even say they don't specifically mention you by name, but they clearly describe their hate for people which you'd identify as.
Now you go to work the next day with this person... Will you also just pretend like none of it? Will that knowledge now not have inherently tainted the work environment for you? What if they're your manager?