There's a well established social phenomena for what you describe as uncharitable reading the words / actions of other people. It's called the fundamental attribution error.
It has been studied in detail with respect to computer mediated communications as far back as the dawn of email and the tendency of readers to assign a lot more negativity to the emails they receive then their senders ever intended.
https://en.wikipedia.org/wiki/Fundamental_attribution_error
It has been studied in detail with respect to computer mediated communications as far back as the dawn of email and the tendency of readers to assign a lot more negativity to the emails they receive then their senders ever intended.