There is no special reason beyond genetics.
American Eskimo Dogs for sure :)
If they have been properly trained and have a dominant owner, then yes, American Eskimo dogs can and probably will be nice.
No, the American Eskimo Dog sheds heavily, making them unsuitable as pets for people allergic to dogs.
Yes they do
Yes, except for the chance of allergies, American Eskimo Dogs tend to be very healthy dogs. With the proper care, at least.
There are some that look like a chihuahua. An American eskimo is probably the one you are thinking about, but there are also the papillon, pomeranian, shiba in, and spitz. All of these dogs can be white but the American eskimo is naturally white so that is most likely the one. I would look up pictures of all these dogs in white just to make sure you are positive it is the breed you are thinking of.
no they do not they have fur
For the most part, American Eskimo Dogs are full grown by the time they reach one year old. On average, they live to be 16 years old.
depends Eskimo dogs if you train them right they can be gentle and kind
For as long as the controversy rolls on, we suppose. Years, maybe
No, American Eskimos come from Northern Europe.
Short answer, no. The American Eskimo Dog has been found to have some dogs who have hip dysplasia, but it is not a common thing for the breed.