[1]https://www.uva.nl/en/profile/t/o/p.tornberg/k.p.tornberg.ht...
Maybe your literacy is not as great as you think it is and unfamiliar written tones are difficult for you. The result is personal discomfort and it's easier to blame external reality rather than your own ignorance and inexperience.
I would say the opposite of partisan would be someone who actively seeks to understand and relate to the views of those who they disagree with, or who are from their out-group. This would also imply independence of thought.
You can have beliefs, but you also must have heart and a brain to open your world view to other perspectives. This is what being an adult is all about. Not this crap that we see today.
Disagreements on the best day to provide services to the public are still attempting the same common objective.
Disagreements on which people will have their rights removed are not a "let's agree to disagree" sort of thing.