Fair enough, but if they actually start doing prenatal tests and abortions...
Well, they'll have a hell of a lot more to reckon with than a bunch of anti-abortionist hicks
Down Syndrome.
Stage 4 of the 8 stages of genocide has already been completed. We have been classified. We have been symbolized. We have been dehumanized. Organizations--wealthy and powerful organizations--have been formed to carry out the genocide. The next step, which has already begun, is polarization. The criminals have a multi-decade lead on us, we cannot smugly sit back and think we will be able to stop them at the last minute.
And it's stupid to put all the onus on the scientists who merely do the technical research. They are not the ones making the genocidal decisions. They are not the ones producing movies that dehumanize us. They are not the ones raising the money that makes the research possible in the first place. The technocrats very often simply don't really grasp what is going on, and when confronted by it, they are very often too innocent and personally ethical and moral to believe that anyone would misuse the knowledge they generate. Scientists are a remarkably trusting and child-like group of people.
However, it DOES play right into the hands of the genocidal maniacs to blame the scientists. If you want the public to believe the demonization, blame the scientists for everything. If you want the public to think that the world would be better off without us, blame the scientists for everything. But, whatever you do, don't call attention to the real criminals, just attack the scientists.
The proponents and drivers of genocide are the "charities", "foundations", and "concerned groups" that produce and promulgate proto-genocidal propaganda. If there were no science at all at their disposal, they'd just rely on public perceptions and prejudice. The biomedical data doesn't require genocide, it's the spin put on it by the genocidal.