Take the classic tarzan case, boy found to be raised and living with apes. Dumb as bricks...very animal like. Yet he can be trained to be "human".
Now let's take an animal, lets say a dog, without education...dumb as bricks. However, with proper training he too can be human like. He won't look like us, or be as smart, but no less an intelligent being as a human.
Bottom line, if it doesn't look like a human, society thinks it's less than nothing and is ok to torture and abuse it. People need to get out of this silly mind frame.
For Humans are nothing more than an educated animal.