On partisanship
Note the range of synonyms for 'partisan':
supporter, follower, adherent, devotee, champion; fanatic, fan, enthusiast, stalwart, zealot, booster.
There is a big difference between a supporter and zealot. Part of the point of mapping a controversy is to develop and tune our sensors, our equipment for judgement, our tools of discernment, to detect the differences between zealous fanatics and supportive fans.