Disagreement is essential to a functioning democracy. One important reason for disagreement is that certain elements of a proposition might not ring true whereas
maybe the basic idea has merit.

I don't think we have to be disagreeable people to disagree about ideas, even as though
there are those operative behaviors in society.

One might disagree through civil disobedience, rational discourse and challenge though this doesn't have to be acrimonious, the solving of differences more effective when they're not.