According to Madison, what is the danger that a faction poses to good government?

It elects representatives.

It acts in its own interest, not the people's interest.

It lacks a majority and forces enactment of oppressive laws.

It is too passionate about one thing and neglects other issues.

It acts in its own interests, not the people's interests. And this is a fundamental elemental that has to exist within a democratic republic, according to Madison. It is necessary to tolerate those that have other ideas and who are acting in their own self interest, but hopefully the democratic process will diminish or decrease the effect of extreme wants of a faction.