Okay, I read the whole thread and it seems like they're being taken out of context when you only point to the idea of the slope. What they seem to be saying isn't that all zoophiles will torture animals, but choosing comfort over trying to actually work to our goals protects those who do. They even say that they're still a zoo, do you think they believe they're going to abuse animals? Absolutely not.

The thread reads as someone frustrated with those focusing only on a comforting acceptance and treating anyone truly fighting for animals as detrimental. You can't simply take a single part of the thread and conclude that zoophilia always leads to zoosadism when the author clearly doesn't believe that.

Do I want acceptance for my attraction? Absolutely, but that's not the fight. The fight is understanding WHY people don't like my attraction and changing that. Most of the hate comes from the idea that non-human animals are inherently inferior and we're disgusting for being attracted to them because of it. Acceptance won't come until we can change minds on that.