There was a lot of support across Europe for either left wing or fascist political groupings through the 20's & 30's.Franco, Mussolini, Action Nationale in France, Oswald Moseley's lot here all had significant popular support.
The first world war, the Russian revolution, many countries having extended franchise so everyone could vote for the first time, huge estate duties in the UK so ancesteral estates couldn't automatically be passed down, the Depression, new technology at a headlong pace - unsettling times & it seemed to polarise politics. Hitler had Trump's trick of mesmerising mass groups into believing & doing things that as individuals they wouldn't have countenanced.