Coughlin lost support also for being anti-Semitic.
After 1938, his radio broadcasts and newspaper, Social Justice, began to criticise Jewish people.
He accused them of being the cause for the Great Depression.
He praised Hitler, even using parts of his speech by his propaganda minister, such views were unpopular in the USA where there were many Jewish people.
In 1940 his radio broadcasts were banned and 2 years later so was his newspaper.
After threats from the government for encouraging rebellion, Coughlin finally gave up and stopped writing.