In the US, there is a very vocal minority that really, really doesn't like abortion.

Some of them actively publicize that people with Down's lead happy, healthy, and independent lives, without significant support. (As we see Gabe does in the article.) They generally stay away from the moral debate.

For people who follow the abortion debate in the US, when people say "as long as it's not used for Eugenics," what they really mean is that they are ok with abortion as long as it's not used to abort Down's fetuses.

I think in my head, I have difficulty reconciling people having different judgements about abortions for (broadly defined) lifestyle reasons vs "eugenics".