Hypocrite or outsider?

There are situations in life where you don't know if you should say what you think, just be quiet or say what you're expected to say. For example, you are supposed to agree with the majority, if you don't and you start disagreeing, you are considered as an outsider and you will be treated like that. In History, when the teacher asks the class if the German Revolution 48/49 should be called a ''revolution'', most of the students say: Of course, it is a revolution. Why do they say that? Just to make the teacher happy and be sure that he will give them a good grade. In Religion, when the teacher says the Koran was written by human being and can't be seen as an original scripture, you find a Muslem agreeing on that. Such things drive me crazy. I don't get it. Why should I turn myself into a hypocrite for the sake of a good grade or getting attention? I always get criticized for speaking my mind but I think that is much better than pretending to be someone I'm not. Of course, I get myself into lots of troubles because of this but on the other hand I feel comfortable by just being me. So, what's better? Being a hypocrite just to be accepted by the majority or just being oneself and being loved for who one really is?