Music often fills me with the feeling that I care about certain things. Idealistic songs make me feel like I will go out and support some cause or another. Romantic songs make me feel that I would do just about anything for someone. Other songs make me feel passionately motivated to go and do amazing things. Some songs probably even make me feel patriotic, though I only infer that from the completely unfamiliar feeling that sometimes accompanies them.
The plausibility of these feelings is really diminished by the music though. If I really cared so much about some cause or person, I would go and pursue the cause or do whatever the person wanted me to, not lie around on my bed relishing the emotional high of feeling like I wanted to. The same goes for movies. The fact that you are sitting there cheering on the good guy, not out in the world doing something good, shows that you don’t really support his principles. Unless the movie is about some guy who gallantly cheers on worthy characters in movies.