I don't know what to say about 1 and 3 other than that I disagree.
Edit: I'll say one thing about 3, lest I seem to be secretly agreeing with your nasty straw man. Lower IQ is a factual claim (which no one here has disputed - are you saying it's false? or just that it's offensive to talk about?). This by no means implies lower intelligence unless you equate IQ with intelligence, a leap that I personally find rather dumb. lexlibra did use the word "intelligence", but the thread was entirely about IQ, so this seemed more like a careless word choice than an expression of racist hatred.