And millions of jews refused to buy them for many decades.
The same Nazis who worshipped Hitler tried to discredit Relativity because Einstein was Jewish.
The truth of a scientific idea is unaffected by the ethnicity or morality of the person who discovers it, and it is unaffected by the good or evil use to which it may be put.
You are absolutely right. That is why such an argument is logically invalid.
Which is why I was somewhat surprised to hear them from someone attacking Creationism--by their own lights, they ought to know better ;-)