Is there a word for when you're rude and insulting, but couch it in a way that sounds like you're trying to be helpful?
Like, I dunno, suggesting someone consider using conditioner so their hair doesn't look Like That?
@evan It's not this exactly, but it reminds me of the fallacy Apophasis: https://en.m.wikipedia.org/wiki/Apophasis
There's probably another fallacy that fits the bill better. There's a whole list of 'em, many of them from the early Greeks: https://en.m.wikipedia.org/wiki/Rhetorical_device
@bammerlaan not too far off.