Regarding 2., are you saying that, in general, some true facts are so harmful that the public needs to be prevent from knowing them? And if so, who is in charge of determining what the public can know, and why are those people immune from the harmful effects of these beliefs?

For example you assume the existence of some people who believe that a liberal democratic society requires women in science and tech, even if they are inherently less able in these fields. Why then, can't these people explain to the public why this is the case, so that the public will then accept the need for women in these fields, regardless of the truth regarding IQ?