I just watched pic related and then read the article the movie came from, and realized that the ones in the wrong here were... Dupont technicians, people educated enough to know or even research the issues with the chemicals they worked with. They didn't care that other people (even their colleages, family, ...), were dying from the effects of harmful chemicals...
Those responsible were not only chemists, but probably doctors as well. Why were those people such cowards? Was it the money? What makes people become cowards?