Trotsky explained that it was what he called the Petty Bourgeoise who were the most likely to support Fascism, by that he meant small business owners and the middle class. As they preferred order to chaos. It needs a leader that they have confidence in and who will keep there status intact. He thought that the middle class do not do extreme if their business is doing well, but can be enraged in times of hardship to support Fascism. The petty bourgeoise in despair and hard times will see Fascism as a bulwark against corporate interest.
Umberto Eco in his 14 attributes needed for fascism to coalesce states that Fascism appeals to the "frustrated middle class"