I don't mind moderators having their ideas or even ranting or even blowing off some steam in the thread they make/parecipate in.
Their moderating job is to avoid the community being drowned in spam/scam etc. and as far as I can see there are few to no spam posts in !opensource@lemmy.ml. In that particular thread they went wild but as far as I can see did not abuse their mod powers.
tl;dr: judge the moderator as the moderator, and the user as a user. I didn't particularly like that thread too, but from moderating POV, I haven't yet seem something by haui I disagree with.