Re: the point that it's socially unacceptable to say "someone is badAttribute because he's raceAttribute": yeah and that's fair enough I think. It's very lacking in basic human decency to say such things. I think the problem is that no one can acknowledge race issues without bringing up uncomfortable facts which may lead to cries of "racist!". I blame partly the extreme-left for being oversensitive and interpreting statistics as racism, but I also blame the extreme-right for intentionally using such statistics to make unwarranted claims. On both the right and the left, there exist individuals who only care about their own self-interest, e.g. an economically-underperforming minority person finds it in self-interest to vote Democrat, and the rich white Christian business-owner finds it in self-interest to vote Republican.
One example that irks me is immigration policy: e.g. do not allow Muslims into country because they have higher % chance of supporting Islamic terrorists. Why not a more sensible policy:
"If some guy is a Muslim and we know nothing else, our estimate of him is the average of all Muslims, i.e. a very small but non-negligible chance of supporting radical Islamic "freedom fighters". We will seek out further information to refine our conditional probability of his supporting our enemies, and only admit him if said conditional probability is sufficiently low."
I'm also not a fan of unfettered democracy because I think the majority of people in the world don't actually understand conditional probability, law, or ethics, etc. It's like letting the people pick the editorial board of a scientific journal.
I would support instead a technocratic government which makes the decisions, but has to "optimize according to an objective function". Tweaks to the objective function are put to a vote, e.g. if we think that inequality is too bad, then propose a change to the section of the objective function which calculates welfare based on the sums of citizen's wealths, to make the function under-weigh extreme wealth and over-weigh raising the wealth of the poor.
I call this "Democratic Objective-Setting with Technocratic Execution".