Feivel, I’m a little confused. If I understand correctly, you chose not to administer D vaccines to your children because the disease is rare in the U.S., even as you acknowledge that it has a much higher incidence worldwide. It seems obvious that the reason D is so rare in this country is that we vaccinate our children (as indicated in the quote from CDC, above), not that they are somehow less susceptible to this disease.
We all know that when individuals start choosing not to vaccinate, it increases the risk to themselves as well as to the rest of the population (see the OP). Why didn’t you vaccinate your children?