I don't think the intention was to offend, either. The problem comes in trying to use one word (reading) to do the work of two.
What the OP calls 'active' reading, what with the note-taking etc, is what we used to call 'studying' - you are not reading the book for the sake of the story, but analyzing it to see what you can learn about the writer's techniques. A scholarly or professional view of the work.
What the OP calls 'passive' reading is just 'reading'. Engaging with a book on a non-scholarly or professional level. (Not that you can't read with a writer's eye, noting things done well, or interestingly, but that's not the primary intent.) And, certainly you can 'engage' with something you're reading, on an intellectual or emotional level.
Reading is a blanket term, covering any and all media. Heck, 'reading' the terrain, or the ocean, is a thing.
'Passive' has negative connotations, though, especially in writer's terms, but, if someone wants money, most people would much prefer someone who passively sits and asks, rather than one who actively steals it.