Why did madison believe that the spirit of party and faction would have a negative impact on the government?

The correct answer to this open question is the following.

In Federalist number 10, James Madison -under the name of Publius- wrote about the utility of the Union as a safeguard against domestic faction and insurrection. Madison believed that the spirit of party and faction would hurt the government because it would create divisions among people. This division would be a reason to start divisions derived from the different ideologies of parties spread through citizens that could confront the country,  And that represented a risk.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.  

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.