Answer:
When Howard Zinn showed us that America did nothing to stop the development of fascism in Italy and Spain, he shows us that the American government of the time was not against fascism as a political movement, but specifically against abuse and racial violence carried out by the Nazis in Germany and Europe.
Explanation:
Howard Zinn was an American historian of Jewish origin, who through his works tried to explain the origins of the authoritarian movements in Europe and the American participation in World War II.
Through his theory, Zinn explains that America and the politicians of the time did not see the fascist movement as a danger or an enemy, understood as a corporatist, personalist, nationalist and socialist government. That is to say, they did not see said political organization as a danger, unlike what happened with communism, which they did identify as an imminent evil. Now, as soon as the question in Germany turned into violence against ethnic and cultural minorities, America began to take measures against these groups, no longer based on their political organization but on the racist and criminal violence of their acts.