Boyfriend doesn't care

Around thanksgiving, I was home from college on break and spending it with my boyfriend. We play this video game together online, and unfortunately a lot of people use inappropriate pictures as their profile picture. I watched his screen as the picture would come up and he wouldn't look away. I tried talking to him about it and asking why he doesn't look away, he said "it's part of the game." We argue and nothing get solved. I bring it up a couple days ago and he gets so mad at me and said "I don't care anymore"