I disagree that it's comparable to leather, with leather it's not done through inhumane practices, I don't think anyone has an issue with an animal being used for a purse, moreso the methods that are often used in obtaining the fur. I don't want to be a part of cruelty or sadistic measures in the name of fashion - it's not worth it to me. I actually like faux fur, but would never buy a bag that uses real fur, because there's no guarantee how it was collected.
I also have my limits with leather, I only use bags with cow leather because.. well, I don't like cows.. but I won't use deerskin, or lambskin.
I definitely, definitely won't use real fur, though, in any case.