Actually, there's quite a lot of people with four arms in India. In Seattle they're rarer, but they do exist. And catgirls, and other, less acceptable manifestations of SURGE happened all over the place, all around the world. And yes, people freaked out. Of course, they had a lot to distract them, what with Shedim, Ghostwalker, the Orichalcum rush, continuing fallout from the Big D's will, and so on.
More to the point, SURGE happened ten years ago. While the ugly or insectoid SURGEd are discriminated against on the same level as orks and trolls, the 'pretty' ones and ones with minor mutations can get acceptance at least.
Again, the prejudice lasted until the new thing to talk about came along, and has only been kept going by hatemongers and crazies.