I started the faction not knowing they were werewolves.
I found out like half way through.
I wanted to continue to associate with the faction, not the werewolves.
I wanted to do the faction quests, not become a werewolf and get involved with them.
again. you want your cake and want to eat it too. you want to do the quest line but don't want to be a werewolf but that's not the way it's written. it's a choice you have to make, you aren't railroaded. if you don't like it when you find out about it, stop doing it.
in any case, your issue is a fairly well known issue that many people have. currently the only solution is console commands for pc users. i'm guessing you aren't on pc so you are stuck.
@jorvik yes, i know. but like i've been saying, no one railroads you into continuing the quest line. it's a choice each person must make. just like the cannibal quest. i choose not to do it. it's a choice i make. i don't feel like i have to do every quest out there. yes, i admit it would be nice to have a full quest line for warrior types where you have the option skip the step of becoming a werewolf but there isn't. oh well, guess i'll just have to be a mercenary adventurer instead.