I haven't noticed that, quite the opposite is my impression.
Here is a concrete example; no reputable news outlet would publish an opinion piece by a creationist in an attempt to be fair or unbiased, and I guess most people here on HN would agree with that. But it gets more interesting. Ideology can be so powerful and deep-seated that becomes virtually invisible, but it's hard to argue that it's not there.
My counterpoint was a simple ask: Is The Guardian therefore not behaving in good faith if for example they choose to not publish opinions by Creationists, or if they don't give equal weighting to Creationists whenever a discussion about say, evolution appears.