Philosophy is not like the sciences where there is a body of knowledge established. Students want to know what the bottom-line in philosophy is. They become convinced that every view is equally good. You try to show them the value of knowing where you stand and why you have taken the stand you have. It is not rude to disagree if one does it respectfully.
Philosophers find it exhilarating and exciting.
The ability to understand this varies with the level of student. Upper level students are self-selected, and they grasp it better. Some students find this threatening, particularly those from religious background. They try to avoid the real intellectual problem. There's a lot of intellectual confusion and resistance.