Parents forcing the son to abandon the Sunnah

Q: I am a first-year student in the Faculty of Commerce at Alexandria University. I try my best to abide by the Shar‘ (Law) of Allah and the Sunnah of His Messenger (peace be upon him), but my family totally opposes me growing a beard and insists that I must shave it. I am not concerned about people at all, but the problem is that my parents strongly insist on me shaving. My mother says that if I want her to be pleased with me I should shave it off. She once said that she would not be pleased with me as long as I kept my beard and another time she said that she would leave the house if I kept it. My father threatens me over it, saying that it will bring me and my family many problems and burdens. All these entreaties and threats hurt me a lot, and my parents also threaten not to support me financially or be pleased with me if I do not shave my beard off. I am very confused and do not know whether to please my father and mother or to abide by this act of Sunnah; sometimes I lean to pleasing them and other times to the Sunnah. I want to combine them both, and I have spared no effort to convince them about this, but they insist on me shaving my beard off. They are Bedouins from the tribe of Banu `Aly, from Matruh Governorate, in the Western Sahara. Would Your Eminence please give me a Fatwa (legal opinion issued by a qualified Muslim scholar) on (Part No. 25; Page No. 173) whether I should keep my beard, even though this will make my parents displeased with me? We know that the Prophet (peace be upon him) said, “The Pleasure of the Lord is in pleasing one’s parents.” Should I commit a sin by shaving it off to please them? May Allah reward you with the best!