Science is not the truth, nor is it more than the truth.
Science is a method by which we arrive at the truth.
It is true that the eugenics movement originated in the US, but it was based on attitudes rather than scientifically established principles. The assumption was that Europeans were superior to 'lesser races' in all things: physical ability, endurance, longevity, intelligence,and of course physical attractiveness.
The latter is of course mostly a value judgment, but most of the others are not related to race at all.
The techniques behind eugenics were similar to the techniques behind breeding dogs, horses, and livestock, which are largely valid: horses run faster now than 100 years ago, border collies are far better at herding sheep than other canines, pigs get fatter faster, chickens mature in half the time it used to take, and much of this is due to breeding.
Selective breeding works. What made Nazi selective breeding bogus was that it was based on the false premise that height, blond hair, fair skin and blue eyes were attributes that were directly connected to strength, intelligence, longevity and such, which they do not seem to be.
Now that they have mapped the human genome, true eugenics (by which I mean breeding children that are actually superior to the average) is a definite possibility. It is now almost certain that selective breeding could be done, and perhaps is being done right now: wealthy parents paying large sums of money to furgle Junior's genes so that he will be smart and tall and free of congenital diseases like Tay-Sachs, sickle cell, mongolism or Reyes' syndrome.
If I were a doctor that could do this, I would not make it public. If I were a parent who paid to do this, I would never make it public either. Robert Heinlein understood the possible public antipathy to this extremely well, and described it in the Lazarus Long series of sci-fi novels.
As to whether science, even 'offending' science to children, of course the answer is 'of course'. Science is as close to factual knowledge as can be established (though it will never be the absolute truth).
Intelligent design is bogus science, because (like Nazi eugenics) it is done by starting with the conclusion (God is the author of Creation) and works bass-ackwards toward the causes.This is not true science, but the method used in Biblical 'scholarship', in which the fact that Elijah was a prophet is assumed to be true, and the scholars investigate HOW he was a prophet, for example.
Science investigates phenomena and proceeds towards whatever conclusions are indicated: even the idea that apes and humans obviously have or had a common ancestor.