Hitler was a liberal.
"We might have called ourselves the Liberal Party. We chose to call ourselves the National Socialists. We are not internationalists. Our socialism is national..."
Adolf Hitler
https://www.theguardian.com/theguard...eatinterviews1
There are progressives and there are Marxist, internationalist socialist, Stalinist, Leninist, Maoist and even anarchist who hide today behind the progressive label.
True progressives believe that the ills of society can be fixed by using science.
During America's progressive era late 19th Century early 20th Century most progressives were socialist...nationalist socialist and they despised internationalist socialist.
During America's progressive era, progressives were found in both the Democratic party and the Republican party.
Woodward Wilson was a progressive and Theodore Roosevelt was a progressive.
FYI:
Hitler was a moderate Nazi, there were some hard core Nazis back in the day.
It was the hard core socialist who decided to run Hitler as the leader of the new Nationalist Socialist Party.