I think it's bad manners to bluntly tell someone they should "read up" on something because it naturally reads as a kind of a closeted accusation of not being sufficiently well informed. There are ways of broaching the topic of what background knowledge is informing their perspective that don't involve the accusation.

Just to add a small bit of anecdotal value so this comment isn't just a scold: I one time many years ago suggesting an elegant way for Twitter to handle long form text without changing it's then-iconic 140 character limit was to treat it like an attachment, like a video or image. Today, you can see a version of that in how Claude takes large pastes and treats them like attached text blobs, or to a lesser extent in how Substack Notes can reference full size "posts", another example of short form content "attaching" longer form.

I was bluntly told to "look up twitlonger", which I suppose could have been helpful if I had indeed not known about twitlonger, but I had, and it wasn't what I had in mind. I did learn something from it though, which was that it's a mode of communication that implies you don't know what you're talking about with plausible deniability, which I suspect is too irresistible to lovers of passive aggression to go unused.