1923 is a little premature. He wasn’t appointed Chancellor of Germany until 10 years after that. Hitler was actually in prison in 1923 for attempting a coup, so it wouldn’t have been too upsetting to say you were against him.
It wouldn't have been Hitler that would have gotten you canceled. It would have been suggesting we go get involved in another war so soon after WWI with no real evidence that it would be important.
However later on there was more support even among Americans with the US Nazi party that existed and tried to run in elections.
To be fair many around the world saw Fascism as a new exciting way to run a country until war broke out. Then those Nazis and fascists were only good when they were dead.
I wonder if those cosplaying as Nazis today understand they aren't the heroes they think they are especially when it comes to US WW2 veterans, (many would consider the real heroes) would want these newer Nazis dead too.
Hitler was always criticized. There's a NYT report calling him out as an antisemite in the 1920's and Casablanca looked down on Nazis almost a decade before the first signs were showing of the holocaust to come.
There's a NYT report calling him out as an antisemite in the 1920's
Sure, but this was at a time where you could get antisemitic magazines delivered to your door, and some people had dozens. There really wasn't as much stigma on it as now (And I'd argue it could use a little more stigma still). There were lots of places around the world where you could discuss the latest details of antisemitism with your hairdresser, and it wouldn't even be that weird.
The Dearborn Independent from Henry Ford was one of the most wildly distributed papers of its time due to the Ford dealer network and how Ford was lauded as a the hero that brought the car to rural folk giving them freedom.
It's unfortunate that his antisemitic views were often the main things one would find in his paper that many would have just accepted as fact. Ford a brilliant man in many ways but this was one of the few ways in which he wasn't.
Now you have me second-guessing, I know there was a classic movie where the characters jab at Nazis before what they were known for came to light. I'll edit it in when I think of it.