If IQ measured the depth of emotional understanding, then yes. You don't have to like it, just find another reason to argue against eating people - there are plenty.
Plenty of very smart people have terrible social and emotional intelligence.
So, I don't think so.
It really doesn't matter, because the rationale you provided was essentially: it is wrong because I don't like it. To keep with your utilitarian line of thinking, a position against cannibalism based on disease transmission would make more sense. Personally, I prefer the classic argument of it being the ultimate violation of personal space - but that is likely because I favor Locke's theory of property and the mixing of labor.
Ah. No. To be clear: this line of reasoning is simply not my cup of tea and I feel zero need to take it seriously or justify my preference.
To each his own.
Or maybe they do, but we are unable to perceive it, because of our low emotIQ?