Oh the movie I'm talking about was not a love story. It was revealing how bad war is to a lot of people. The book version got banned and burned by the Nazis, when the movie came out Nazis attacked the movie theaters and the moviegoers. The name is "All Quiet on the Western Front" and it's very powerful. Here's a few quotes from Wikipedia:

he volunteers to go on a patrol and kills a Frenchman in hand-to-hand combat for the first time. He watches the man die slowly in agony for hours. He is remorseful and devastated, asking for forgiveness from the man's corpse

The book was also banned in other European countries on the grounds that it was considered anti-war propaganda; Austrian soldiers were forbidden from reading the book in 1929, and Czechoslovakia banned it from its military libraries. The Italian translation was also banned in 1933

https://en.m.wikipedia.org/wiki/All_Quiet_on_the_Western_Front