Astrix –
chadssidus is not simply a mode of dress and a heritage of beautiful stories. It is a philosophy and a way of thinking which in many ways contradicts the way of the litvishe yeshivos. A litvishe rosh yeshiva would discourage you from learning chassidus because presumably you are learning in order to know how to think, i.e. to have correct hashkafos, and from the rosh yeshiva’s perspective you will not find the correct hashkafos there. It’s not about finding fault with people. Chassidim are wonderful people. But the litvishe rosh yeshiva believes that the chadid’s hashkafa is mistaken, so he will not encourage his student to learn it.