Answer:
The spark of nationalism in germany and Italy gave their expansionist idea, as they believe they are superior as one race, its nationalism boost the confidence of the nation to wage war with other nations.
what does that mean sorry I can't speak other languages
I believe the answer is: He believed that decisions should be made with practicality and force.
Bismarck believed that a nation shall not be afraid to use forces in order to establih control and superiority toward other nations.
Due to the similarities in principle, Nazi Germany honored his name by using it as the name of their battleships.