I agree with all of that, but sadly the word 'nerd' is not clearly defined. To many it is a lifestyle choice, including some people who label themselves as nerd

I agree with all of that, but sadly the word 'nerd' is not clearly defined. To many it is a lifestyle choice, including some people who label themselves as nerds. If you compare, "When the Goths go marching in" (another lifestyle choice) would seem much more acceptable than "When the Aspergers go marching in" (which is closer to what you described as nerd).