I'm not sure how either of those support your point about the term toxic masculinity. I claimed, "he has said he doesn't believe in the term toxic masculinity".
In your first link, he is asked, "We hear the term “toxic masculinity” a lot these days. As someone who writes a lot about manhood, what does it mean to you?". He answers, "Oh boy, I’m not sure if I really believe in it".
Sounds to me like he doesn't believe in the term toxic masculinity.
In your Huffington Post link, the interviewer claims "It’s a book about consumerism, and an expressive, violent response to the cold fact of it. It’s also a book about toxic masculinity, even if its author never deigns to expressly critique or uphold controlled violence". I don't know why we would consider the interviewer the authority on the text in question here. Here is Palahniuk's take in the same interview:
Q: Would you say Fight Club is more of a critique of violent masculinity, a celebration of it, or both?
A: Boy. I wouldn’t say it’s a critique. I think that because it’s consensual, it’s OK. It’s a mutually agreed-upon thing which people can discover their ability to sustain violence or survive violence as well as their ability to inflict it. So, in a way, it’s kind of a mutually agreed-upon therapy. I don’t see it as condoning violence ― because in the story it is consensual ― or as ridiculing it, because in this case it does have a use.
Thanks for the HuffPo link though, here is another quote where he gives what he thinks the message of Fight Club is that seems to be in agreement with the other ones I read, "The central message of Fight Club was always about the empowerment of the individual through small, escalating challenges". It also has this quote about killing the father, "In a way, it’s like everyone rebelling against dad, and discovering their own power by killing the father, as the Buddhists would say". I've seen interpretations of Fight Club as a Buddhist allegory (https://web.archive.org/web/20090423020258/http://www.unomah...), interesting to hear him bring that up.