Everyone is stupid at times, question is if we are willing to learn from mistakes.
Like denying many years of research with good predictive qualities, which you could probably also see personally, should have made you suspect about your point of view.
Generally, the "overly emotional" push-back from the other party after one violates social norms is a cue to accomplish two things:
1) Alert others nearby that this was in fact a violation of social norms, and prepare them to potentially side against the violator.
2) Check to see if the offending party is generally in control of their social behavior, and this was just a transient "slip-up", or if the offending party is stuck in their anti-social modes and unable to recover negative social interactions. This acts to provide a stronger signal both to the offended party as well as to others nearby.
For the record, this is a topic I'm pretty well-versed in, and I am aware of the research. I'm also aware (as you should be) that there's a great deal of debate about what IQ tests measure and don't measure.
Your argument (ignoring the personal attacks) is not unreasonable. Neither is mine. This is not a settled matter, and is one where reasonable people can and do disagree. Including the experts in the field.
Perhaps I'm not, but at least I'm good enough at it to be able to have a discussion without resorting to insulting the person I'm talking with.