Read "Wigs On The Green" by Nancy Mitford. It was written in the years before WWII, and includes a character named Eugenia, who is an eager young facist. Mitford makes her sympathetic. Her adoration for Hitler and a fictitious British facist called Captain Jack, are shown as a charming sort of youthful idealism.
In her Facist dream, Jews are to be sent to "Jerusalem the golden, with milk and honey blest." Not gassed. I don't think people believed that Hitler would really do that.