Is this social cleansing of people with downs syndrome

In Iceland very few babies are born with Downs syndrome with a high take  up of pre natal tests and almost 100% of those with a positive test having terminations. Why  is this?

Is it that the environment would present special challenges? Is care for those who live with the condition so poor that life is seen as unacceptable? Or is it socially   unacceptable so that unconcious social cleansing takes place?

I find this disturbing, whilst I wouldn't wish  for any child to be disabled. This  procedd though suggests that people with downs are not valued here. Disabled people including those with downs can have a life worth living, why here then does there seem to be such an effort for them not to exist? This article relates only to downs, though I wonder what their attitude is to other disabilities.

In the article a mother of a child with the condition says she wants her child to grow up to be part of society on her own terms, thats how it should be for every child whether disabled or not. How can it be for that child though if she is in a minority that has been actively and markedly reduced?