Can you unpack your grounds for trusting your predictions about other people's reflectively consistent moral intuitions, whether about this in particular or more generally?

That isn't a position I have or have presented so it would not make sense for me to try to unpack the null. In particular I have huge amount of doubt regarding reflectively consistent intuitions - even my own. (ie. This is a minor and non-malicious "When will you stop beating your wife?" problem.)

My prediction was in regards to counterfactual experience of aversive moral feelings in a provided extreme example of those people that I know. I expect them to get squicked out at the possibility of raping and killing their entire family even if they have understanding of the moral principles.

(There may be an exception or two among people I suspect have high functioning sociopathic tendencies but these come in under the second observation regarding them not caring anyway.)