[minimaxir]

It's about context: the annotations were glorifying a manifesto that was the prelude to mass murder.

[angersock]

So, some parts clearly were, right, complimenting the writing style and whatnot (which, honestly, wasn't great, but whatever)?

That comment about his sister I viewed more as teasing/disparaging the author--your mileage may vary.

Reading a bit more about the dude from Rapgenius, though, he seems like kind of a gangsta-wannabe tool.