So, you're claiming that just about everything that makes us in inheritable, until things like intelligence comes into scope? Far smarter people than you or I have claimed the contrary. That's not to say environmental variables can change how IQ drifts, but there is nevertheless a large part founded on genetics.

It's not clear what you're responding to.

Lead lowers IQ (and has other negative impacts). Fetal alchohol syndrome lowers IQ (and has other negative impacts). Adding Iodine to salt apparently raised average IQ by 15 points in areas where the natural diet was low in it.

Many things are apparently very inheritable, like height, yet in certain generations almost everyone is taller than their parents due to environmental factors. This isn't exactly rocket science.

My point was that in history, the people accused of being genetically inferior (the jews, the irish, the italians, native americans, africans, chinese etc.) have generally been outgroups that have been unfairly targeted by pseudo-science, not that IQ does not have a hereditary component.

I get where you're coming from, but you can't honestly just use this as a counter-balance to genetic pseudo-science. You can't argue with genetic pseudo-science at all! You have to make your case about the foundational science first.