Well, it's true in that it's very common for human beings to form social gestalts where certain conformities are expected and enforced. We tend to be a bit of a tribal species it's evident throughout human history. That being said, being different doesn't always mean rejection, often being different can become a fad, something people can be drawn to where they want to follow. Human beings can be very maleable. This is why "different" can be a threat to those who prefer an older generational norm.