That really depends on who the nationalists are what their goals are.

After the Franco-Prussian war, Bismark, a Prussian and German nationalist if their was one, said that “Germany is a satisfied state.”

In other words, in his view, Germany had achieved its nationalist goal, unification. Others want to rule the world.

And remember, Lenin said, “I spit on Russia.” — but he founded the most powerful and ruthless nationalist state in history.