First, while repelled by the Nazi extreme, anti-semitism was rather widespread in the US and elsewhere at the time of WWII. I was raised in large part by my Jewish grandfather in New York during the war.
Second, Patton had three times been forced to give public apologies for his behavior as shown in the movie. He apologized for slapping a soldier, he apologized for talking about the vitues of English speaking countries in a speech in England (DeGaulle objected), he apologized for comparing the Nazi party to Republicans and Democrats.
Third, if in an alternate history. Hitler was our ally against Stalin, and he had publicly insulted Hitler in this way, he would have been made to apologize again.
Apparently, a bit ahead of his time....
It is rather funny, isn’t it? You’d think some of the internet generals on this thread would’ve seen the movie.