In mindkilled enviroments people make arguments that they would never make if they would look at the issue with a statistical perspective. This is one of those arguments.

I agree, and this is why I think it's sketchy (to put it politely) to argue that people are more (or less ) rational now than some point in the past because of greater (or lesser) acceptance of some political viewpoint.

Besides which, even if there were overwhelming proof that support of affirmative action is rational or irrational, I'm pretty confident that most people would choose their belief based on (1) what they are supposed to believe; and (2) what favors their interests.

In short, the vast majority of people are irrational when in "far mode" and always have been.