Earlier quoted context omitted.
http://en.wikipedia.org/wiki/Scientific_racism
I see that there is a history. But science, by its nature, is descriptive, not prescriptive. It describes how the world is, not how it ought to be. Pretend for a second that science discovered convincing/rigorous evidence that white people were less intelligent genetically than other races. That isn't justification for intolerance against white people. We get to choose our values as a society, independently of the re…
It is a poor justification for intolerance, and that's part of what the original poster was pointing out. But just because it's a poor justification doesn't mean it hasn't been done. People (as a collective) are not inherently rational or logical. They're easily led by the nose by charismatic speakers and those skilled in rhetoric. They want to believe they're special or that someone else is to blame and when someone presents something that helps them believe that they lap it up. It's happened throughout history, and it'll continue through the future. The best we can hope for is that our understanding of the universe and nature casts light on more things so those that would abuse it have fewer shadows to hide in.