Increasing feelings of nationalism among many groups led to which consequence after world war i?

Increasing feelings of nationalism among many groups led to the rise of fascism.

Explanation:

Fascism was a political, economic and social system that gained momentum after the First World War, especially in countries in economic crisis (Italy and Germany). In Italy, fascism was represented by Italian leader Benito Mussolini. In Germany, Adolf Hitler was the symbol of fascism, which in this country was called Nazism.  This system ended with the Axis defeat (Germany, Italy and Japan) in World War II.

The fascist system was undemocratic and concentrated total powers in the hands of the leader of government. This leader could make any kind of decision or enact laws without consulting politicians or representatives of society.

Among the fascists was the nationalist ideology based on the idea that only what is of the country has value. Extreme valuation of the culture of the own country to the detriment of the others, that are considered inferior.