The first extreme is, yes, hating something for being nonconformist or different or taboo. Religion is a good example of this and it's very strict orders to live your life by.
However. There is the other extreme. Loving something for being different. People also have a draw to the odd and taboo. We stare at car crashes and look up crazy stories because they're so different than a normal day in our lives.
I don't think it can be specifically categorized with conforming and nonconforming people because everyone exhibits interest in the strange and unknown, it's human nature to look for more.
There is certainly a possibility that one can be raised to be incredibly open minded if open mindedness can not be a naturally established (I'm referring to a trait acquired from birth) personality trait. I would hold upbringing to be the most responsible for hatred towards nonconformists as psychologist Jose Navarro states that
family and school education play a major role in determining where or who hatred would be directed at by someone.
As someone is brought up, that person is exposed to cultural norms that in some cases are deeply enforced by the people he/she interacts with. If the person is in an environment where values and traditions are considered equivalent to having morality , then later being aware of other people who have beliefs that contradict those values would frustrate the person because it would make the person feel as if his/her beliefs are being threatened in one form or another.