IQ scores are affected by education and training, so if the US has lower IQ than European nations (a fact I have no idea if it's true) I would suspect that's be

IQ scores are affected by education and training, so if the US has lower IQ than European nations (a fact I have no idea if it's true) I would suspect that's because of the differences in education (where education does not just mean school). If you want to suggest there is a big genetic difference in the two populations, I think you're going to need to cite some references there before that's credible.