Hello! I'm looking for a certain WWII themed film that features two characters: one is a German man (who I think is an accountant or University professor?) who is repeatedly asked to join the Nazi party before he is forced into it or be killed. The other is his German Jewish friend (who is probably the accountant) who disapproves highly of his friend's new SS status, despite the fact that his friend didn't have a choice. The guy who is now a Nazi loses touch with his Jewish friend because I think he's sent to a concentration camp, but in his guilt he keeps seeing him everywhere even though he's not there at all.
There's a scene where he thinks he sees him in a small band of Jews playing songs in the camp.
I don't want to spoil it, but in the end it's hard to tell whether or not the Jewish man is alive or not?
It was an American film, if that helps!