Actually a huge number of people supported Fascism in the late 20's and early 30's.
Mosely, after WW1, in which he behaved extremely courageously, crossed the floor and sat with Labour as and Independent and soon joined MacDonald's Labour cabinet.

The horrors of German Fascism were unknown at the time.

In the sixties I worked with a Communist ex railway driver, who told me stories of battles fought with the "blackshirts" in the East End of London during the 30's......The Fascists had much public support
my friend reckoned 50/50..... The Communist fighters were much in the minority, but as public opinion changed in the lead up to war with Germany, they prevailed.