In the 30's, everyone knew the Germans were going to attack at some point. Even Mussolini asked for more time to build his military. Jews were leaving Germany en masse with tales of repression.
In Hollywood movies, yes. Not in the REAL world. Even in Poland which was close to Germany, knew Germans and feared them those who were warning against Hitler were often dismissed as cranks (my father likes to say that when his was a boy in 1930's he was telling to his parents and relatives "Hitler will attack out country and will kill us all" and they were making fun of him)
I am telling you again, the Hollywood movies show the FAKE history.