Increasing feelings of nationalism among many groups led to which
consequence after World War I?

the rise of fascism or so called national socialism in countries like Germany and Italy.

One very negative consequence increased feelings of nationalism after world war 1 was the rise of fascism or so called national socialism in countries like Germany and Italy.

Explanation:

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

these the citzens and goverment come to terms some of the amendments gave the states more power then the goverment and some protocted americans rights