On the other hand, you take a sensitive child (as these children tend to be extremely moralistic and perfectionists) and try to make them make friends with kids who think squashing bugs and yelling “die” is a good time, well, why would they want to make friends with children like that?
Sorry, but this was exactly the kind of stereotype I was criticising.
Ime (large extended family of various degrees of giftedness/non-giftedness + lifetime of teaching HE), I see absolutely no evidence of a direct correlation between moral rectitude/perfectionism/sensitivity and IQ.
Noone in my family ever stamped on a bug for fun but that's because we are generally kindly people, regardless of individual giftedness, and have been brought up to behave.
Otoh I have seen highly intelligent people capable of extreme cruelty, and indeed capable of exactly the kind of stamping-on-a-bug-for-fun type of cruelty.
And known many children (and adults) who were not intelligent but both kindly and high-principled.
Have also known some highly intelligent people who were nice but with a tendency towards rule-breaking.
And some who were anything but perfectionists.