"Most children's books and movies are anthropomorphic and I think that detaches us from animals, because we automatically think of them with fictional attributes. It's the same with zoos and circuses, which they claim sensitize people to animals when it actually does the opposite; it desensitizes us to the use and abuse of animals."
In my opinion, we rarely see the abuse of animals and, instead, only see the final products whether it be entertainment or palatable food. It makes it far more easy to ignore or overlook the process by which the final goods or services were delivered especially when they produce happiness or re-enforce life-long habits.
There are many other points made by Roth which are important to vegans and those who are seeking to embrace or teach greater compassion for the treatment of animals in this article from the Huffington Post.