All groups will try and preserve their own identity, because if they don't, they stop existing. I'm merely making an observation here, not condoning the actions of groups. This kind of behaviour may seem harmless in some situations, but then also fuels some of the worst instances of discrimination humanity has seen.
The interesting thing is that most people assume that democracy is inclusive, because everybody has a voice, but in this case, the inclusive thing to do would have been to watch something that only one person wanted to watch, to make them as a minority, comfortable, whereas the democratic thing to do is to ignore the opinion of the minority as not relevant to the views of the group.
Where the discussion becomes difficult, I guess, is when the dividing line between majority and minority coincides with that of privileged (PS. I hate what this word has come to mean) and unprivileged.
Regardless, a small group of people has more room for compromise than a democratic state, and as I said, I don't condone the way these kind of situations are usually handled.