Furries are zoophiles who like to masturbate to half-animal pornography. They have no justification. They get hot when they see animal people, occasionally dropping the "people" part. Some of them wish they were animals themselves, but most are content to dress up as animals and have sex. Either way, every single one of them is broken inside.
Some furfags claim that they have no sexual interest in animals whatsoever, and simply enjoy walking around their house in a fucking dog suit. This is total horseshit. All furfags are drawn to sexual perversity, regardless of their preferred species. Furfags only say this kind of thing when threatened with death or when they are trying to "surprise yiff" someone new.
Normal people tend to keep their fetishes and developmental oddities to themselves. Furries, on the other hand, believe their fetish is a lifestyle and that they must announce it to everybody on the Internet through their icon or sig. Society might actually hate furfags less if they didn't wish to justify their perversions so strongly that they bring their fursuits and molested dogs into every normal place they can find, and proceed to spew their crap. Every pervert must first accept that they are fucked up and either roll with it or an hero. Furries refuse to do so, thus making them easy targets for trolls and lulz.
The majority of the Internet hates them because they won't stay in FChan and Fur Affinity, and continue to annoy everyone with their persecution complex and disgusting fetishes. They are pushy, obnoxious, gullible, insecure, and completely incapable of understanding how stupid the concept of their fandom is. As such, they'll take offense to the claims of it being a sexual fetish, as if without the sexual aspect, being obsessed with cartoon animals would be perfectly fine. 'Cause it's totally normal to be romantically involved with Bugs Bunny or your pet dog
More often than not, furries will swear up and down that their precious fandom isn't all about the sex. This is utterly defeated the moment you wander into any furry artist's gallery be it on FA or what have you. It will be plagued with absolutely nothing but smut drawings and smut commissions. It is also noted that furries will often try to tame their porn, by replacing it with extreme suggestions through other pictures or even how they articulate their words. They go to cons in the hopes of even getting in a hotel bed with their other in their fur suits, since they can't acquire sex by normal means. No matter how hard they try covering it up with charities or well-intention gestures towards some positive result. What boils down to the bottom line is that this "fandom" is simply a giant fetish sex party in denial.
Even going as far as denial, it's even funnier when they try so hard to justify why it is they're into this disease. They'll find any scapegoat they can but it all ends in the same way - they fantasize particular furry characters into many sex scenes and dragged through their sick fetishes. You can find furries hidden in other fandoms from Anime - Gaming because that's where and how they recruit more members into their orgy clan