I have a couple of suggestions to add:

I was considering leaving the other site before the API fiasco because it felt like so many users approach engagement as rhetorical combat, that is, one commenter will win and one will lose. Instead, think one of Covey’s habits of highly-effective people: “Win-win, or no deal.” Approach discussion on the Fediverse as a collaborative act, in which you’re exchanging ideas with another person. Even if you disagree, you can both win by respectfully hearing it out the other person. And if the other person won’t collaborate? No deal! Just disengage.

Just like in intimate relationship, use “I” statements instead of “you” statements. Telling people who they are and what they believe is not only disrespectful, but probably wrong, often exaggerated or distorted for rhetorical combat purposes. People get angry when their identity gets poked at. One exception, of course, is when giving advice, like, stick to what you know, and share your thoughts and your reactions to a topic.