Fascists gained power in Italy, Germany, and Spain as a direct result of anti-communist sentiment (and in the case of Germany, a failed communist revolution). Mussolini's early writings were directly proposing nationalism as the answer to communism's failures. Everywhere fascism had success it was because it was pitted against the threat of communism. I don't know how the rise of Fascism was anything but reactionary.
I agree that facism's rise was tied to nationalism's rise.
But we're talking about the root causes of WWII. And one of the Nazi party's specific goals when invading Poland was to exterminate the Jews and Roma (Gypsy) populations of Europe.
Fascists gained power in Italy, Germany, and Spain as a direct result of anti-communist sentiment (and in the case of Germany, a failed communist revolution). Mussolini's early writings were directly proposing nationalism as the answer to communism's failures. Everywhere fascism had success it was because it was pitted against the threat of communism. I don't know how the rise of Fascism was anything but reactionary.