I suspect it has more to do with naivete on their part "if only they had the same chances as we did with education" etc and potentially partly out of guilt for something that possibly did not even happen. Also I do not think they actually think that there are any differences in IQ between nations. Because that would be... *gasp* RACIST! And they most certainly are not racist, no way! *sarcasm*
Being smart is no protection from being fooled by the powers that be, some hustler on the street or by your own biases. Nazism and communism are (or were) popular among the educated, the typical user of alternative medicine is a well educated, younger woman. Smart people are opportunists, as well. I believe that the only reason we're seeing so much immigration and so little resistance to it from state actors is that it seems to solve the problem of aging populations, it produces cheaper labour, drives up the price of real estate and so on. And who would want to say 'no' to people who only want a "better life for themselves". Not to mention that there are actual loony lefties that actually do think that property is theft, borders are to abolished and that ends justify the means. Even if that means that they'll be actually doing the bootlicking to crony capitalists at the same time.
