In what way do nationalistic drive have everything in common with how wars start?
Voice or no voice, the people can always be brought to the bidding of the leaders. That is easy. All you have to do is tell them they are being attacked, and denounce the pacifists for lack of patriotism and exposing the country to danger. It works the same in any country."
Hermann Goering
The sexist language is historically correct. Sorry ladies, history wasn't kind to you in general.
Nationalism is about building a strong us/them split, about having people internalize clear categories of Our Nation and The Others. This directly facilitates war.