I'm a furry/kemono, and I can tell you this: the vast majority of us do not worship animals, nor want to perform acts of bestiality.
A majority of us use their fursonas not as a replacement, but as an "avatar" for some escapism (just like you would if you played a WRPG like Skyrim where you make your own character to escape reality for a little bit).
Most of us are, alas, riddled with fetishes of a sexual type they can't live in real life and explore through other means (art and roleplay), and too many of us are followers of the modern fads of SJW-tier intolerant "tolerance". But there are also those who keep it as an hobby and avoud pornography and lewd content.